OPINION

MORENO, J.

This case concerns the validity of a provision in an arbitration agreement between Discover Bank and a credit cardholder forbidding classwide arbitration. The credit cardholder, a California resident, alleges that Discover Bank had a practice of representing to cardholders that late payment fees would not be assessed if payment was received by a certain date, whereas in actuality they were assessed if payment was received after 1:00 p.m. on that date, thereby leading to damages that were small as to individual consumers but large in the aggregate. Plaintiff filed a complaint claiming damages for this alleged deceptive practice, and Discover Bank successfully moved to compel arbitration pursuant to its arbitration agreement with plaintiff.

Plaintiff now seeks to pursue a classwide arbitration, which is well accepted under California law. (See Keating v. Superior Court (1982) 31 Cal.3d 584, 613-614 [ 183 Cal.Rptr. 360, 645 P.2d 1192] ( Keating), overruled on other grounds in Southland Corp. v. Keating (1984) 465 U.S. 1 [ 79 L.Ed.2d 1, 104 S.Ct. 852] ( Southland).) But plaintiff's arbitration agreement with Discover Bank has a clause forbidding classwide arbitration. Moreover, the agreement has a Delaware choice-of-law provision. Discover Bank argues that Delaware law allows contracting parties to waive class action remedies. The trial court ruled that the class arbitration waiver was unconscionable and enforced the arbitration agreement with the proviso that plaintiff could seek classwide arbitration. The Court of Appeal, without disputing that such class arbitration waivers may be unconscionable under California law and without addressing the choice-of-law issue, nonetheless held that the Federal Arbitration Act (FAA) ( 9 U.S.C. § 1 et seq.) preempts the state law rule that class arbitration waivers are unconscionable.

As explained below, we conclude that, at least under some circumstances, the law in California is that class action waivers in consumer contracts of adhesion are unenforceable, whether the consumer is being asked to waive the right to class action litigation or the right to classwide arbitration. We further conclude that the Court of Appeal is incorrect that the FAA preempts California law in this respect. Finally, we will remand to the Court of Appeal to decide the choice-of-law issue.

I. FACTUAL AND PROCEDURAL BACKGROUND

The following undisputed facts are largely drawn from the Court of Appeal opinion. Plaintiff Christopher Boehr obtained a credit card from defendant Discover Bank in April 1986. The Discover Bank cardholder agreement (agreement) governing plaintiff's credit card account contained a choice-of-law clause providing for the application of Delaware and federal law.

When plaintiff's credit card was issued, the agreement did not contain an arbitration clause. Discover Bank subsequently added the arbitration clause in July 1999, pursuant to a change-of-terms provision in the agreement. Relying on the change-of-terms provision, Discover Bank added the arbitration clause by sending to its existing cardholders (including plaintiff) a notice that stated in relevant part: "NOTICE OF AMENDMENT . . . WE ARE ADDING A NEW ARBITRATION SECTION WHICH PROVIDES THAT IN THE EVENT YOU OR WE ELECT TO RESOLVE ANY CLAIM OR DISPUTE BETWEEN US BY ARBITRATION, NEITHER YOU NOR WE SHALL HAVE THE RIGHT TO LITIGATE THAT CLAIM IN COURT OR TO HAVE A JURY TRIAL ON THAT CLAIM. THIS ARBITRATION SECTION WILL NOT APPLY TO LAWSUITS FILED BEFORE THE EFFECTIVE DATE."

In addition, the arbitration clause precluded both sides from participating in classwide arbitration, consolidating claims, or arbitrating claims as a representative or in a private attorney general capacity: ". . . NEITHER YOU NOR WE SHALL BE ENTITLED TO JOIN OR CONSOLIDATE CLAIMS IN ARBITRATION BY OR AGAINST OTHER CARDMEMBERS WITH RESPECT TO OTHER ACCOUNTS, OR ARBITRATE ANY CLAIM AS A REPRESENTATIVE OR MEMBER OF A CLASS OR IN A PRIVATE ATTORNEY GENERAL CAPACITY."

The arbitration agreement also stated that the FAA would govern the agreement: "Your Account involves interstate commerce, and this provision shall be governed by the Federal Arbitration Act (FAA)." "The arbitrator shall follow applicable substantive law to the extent consistent with the FAA and applicable statutes of limitations and shall honor claims of privilege recognized at law." Existing cardholders were notified that if they did not wish to accept the new arbitration clause, they must notify Discover Bank of their objections and cease using their accounts. Their continued use of an account would be deemed to constitute acceptance of the new terms. Plaintiff did not notify Discover Bank of any objection to the arbitration clause or cease using his account before the stated deadline.

On August 15, 2001, Boehr filed a putative class action complaint in superior court against Discover Bank. Plaintiff alleged two causes of action — breach of contract and violation of the Delaware Consumer Fraud Act (Del. Code Ann., tit. 6, §§ 2511-2527). The latter act in part prohibits misrepresentations "of any material fact with intent that others rely upon such concealment, suppression or omission in connection with the sale, lease or advertisement of any merchandise." ( Id., § 2513.) He alleged that Discover Bank breached its cardholder agreement by imposing a late fee of approximately $29 on payments that were received on the payment due date, but after Discover Bank's undisclosed 1:00 p.m. "cut-off time." Discover Bank also allegedly imposed a periodic finance charge (thereby disallowing a grace period) on new purchases when payments were received on the payment due date, but after 1:00 p.m. The complaint acknowledged that the contract with Discover Bank provided that the contract was "governed by federal law and the law of Delaware." Plaintiff alleged, however, that "this choice of law provision applies only to plaintiff's substantive claims and not to other issues related to the contract, which plaintiff contends are governed by California or other applicable law."

Discover Bank moved to compel arbitration of plaintiff's claim on an individual basis and to dismiss the class action pursuant to the arbitration agreement's class action waiver.

Plaintiff opposed the motion, contending among other things that the class action waiver was unconscionable and unenforceable under California law. Discover Bank, on the other hand, argued that the FAA requires the enforcement of the express provisions of an arbitration clause, including class action waivers. Discover Bank contended that under section 2 of the FAA, arbitration agreements should not be singled out for suspect status under state laws applicable only to arbitration provisions.

The trial court initially granted Discover Bank's motion in its entirety under Delaware law. After Discover Bank's motion to compel arbitration was granted, the Fourth District Court of Appeal decided Szetela v. Discover Bank (2002) 97 Cal.App.4th 1094 [ 118 Cal.Rptr.2d 862] ( Szetela), which held, for reasons explained below, that a virtually identical class action waiver was unconscionable. Plaintiff, citing Szetela, moved for reconsideration of that portion of the order enforcing the class action waiver.

The lower court found Szetela constituted new and controlling authority for the proposition that, under California law, an arbitration class action waiver is unconscionable and, thus, unenforceable. The trial court further conducted a choice-of-law analysis and concluded that enforcing the class action waiver under Delaware law would violate a fundamental public policy under California law as articulated in Szetela. Upon determining it would be proper to sever the class action waiver clause from the rest of the arbitration agreement, the trial court struck the class action waiver clause from the agreement, ordered plaintiff to arbitrate his claims individually, and left open the possibility that plaintiff may succeed in certifying an arbitration class under California law.

After the lower court granted plaintiff's motion for reconsideration, Discover Bank filed a writ petition seeking reinstatement of the lower court's original order enforcing the arbitration clause in its entirety by compelling plaintiff to arbitrate on an individual basis and precluding him from participating in class litigation or class arbitration. The Court of Appeal issued an order to show cause.

The Court of Appeal granted Discover Bank's writ. It did not take issue with the premise that class action waivers are unenforceable, at least under some circumstances, under California law and that this rule could override the Delaware choice-of-law provision. But the Court of Appeal held, for reasons elaborated below, that any California rule prohibiting class action waivers was preempted by the FAA, and that Szetela had failed to adequately analyze the federal preemption issue. It therefore upheld the Discover Bank class action waiver. We granted review.

II. DISCUSSION

Before addressing the questions at issue in this case, we first consider the justifications for class action lawsuits. These justifications were set forth in Justice Mosk's oft-quoted majority opinion in Vasquez v. Superior Court (1971) 4 Cal.3d 800, 808 [ 94 Cal.Rptr. 796, 484 P.2d 964] ( Vasquez): "Frequently numerous consumers are exposed to the same dubious practice by the same seller so that proof of the prevalence of the practice as to one consumer would provide proof for all. Individual actions by each of the defrauded consumers is often impracticable because the amount of individual recovery would be insufficient to justify bringing a separate action; thus an unscrupulous seller retains the benefits of its wrongful conduct. A class action by consumers produces several salutary by-products, including a therapeutic effect upon those sellers who indulge in fraudulent practices, aid to legitimate business enterprises by curtailing illegitimate competition, and avoidance to the judicial process of the burden of multiple litigation involving identical claims. The benefit to the parties and the courts would, in many circumstances, be substantial."

We quoted much of the above language with approval almost 30 years later in Linder v. Thrifty Oil Co. (2000) 23 Cal.4th 429, 445 [ 97 Cal.Rptr.2d 179, 2 P.3d 27] ( Linder). We also quoted with approval Justice Tobriner's concurring opinion in Blue Chip Stamps v. Superior Court (1976) 18 Cal.3d 381, 387 [ 134 Cal.Rptr. 393, 556 P.2d 755]. In the latter case, this court rejected a class action certification against a trading stamp company that allegedly had collected excess taxes, but had given over the excess tax collected to the public treasury and had discontinued the practice before the suit was filed. "Although the majority in Blue Chip Stamps placed utmost significance on the small amount of potential individual recovery (18 Cal.3d at pp. 385-386), Justice Tobriner's separate opinion effectively clarified that trial courts remain under the obligation to consider 'the role of the class action in deterring and redressing wrongdoing.' (18 Cal.3d at p. 387 (conc. opn. of Tobriner, J.).) Invoking settled principles, Justice Tobriner emphasized: 'A company which wrongfully exacts a dollar from each of millions of customers will reap a handsome profit; the class action is often the only effective way to halt and redress such exploitation. [Citations.] The problems which arise in the management of a class action involving numerous small claims do not justify a judicial policy that would permit the defendant to retain the benefits of its wrongful conduct and to continue that conduct with impunity.'" ( Linder, supra, 23 Cal.4th at pp. 445-446.)

These same concerns were acknowledged by the United States Supreme Court: "'The policy at the very core of the class action mechanism is to overcome the problem that small recoveries do not provide the incentive for any individual to bring a solo action prosecuting his or her rights. A class action solves this problem by aggregating the relatively paltry potential recoveries into something worth someone's (usually an attorney's) labor.'" ( Amchem Products, Inc. v. Windsor (1997) 521 U.S. 591, 617 [ 138 L.Ed.2d 689, 117 S.Ct. 2231].)

It is this important role of class action remedies in California law that led this court to devise the hybrid procedure of classwide arbitration in Keating, supra, 31 Cal.3d 584. In that case, plaintiff 7-Eleven franchisors sought to invalidate an arbitration agreement between them and Southland Corporation and proceed with class action litigation to redress Southland's alleged systemic misconduct. This court held that the arbitration agreement was enforceable for most of the claims. In considering the impact that enforcement of the arbitration agreement would have on class action claims, the Keating court stated: "This court has repeatedly emphasized the importance of the class action device for vindicating rights asserted by large groups of persons. We have observed that the class suit '"both eliminates the possibility of repetitious litigation and provides small claimants with a method of obtaining redress for claims which would otherwise be too small to warrant individual litigation. [Citation.]"' [Citation.] Denial of a class action in cases where it is appropriate may have the effect of allowing an unscrupulous wrongdoer to 'retain the benefits of its wrongful conduct.' [Citation.] [Moreover,] '[c]ontroversies involving widely used contracts of adhesion present ideal cases for class adjudication; the contracts are uniform, the same principles of interpretation apply to each contract, and all members of the class will share a common interest in the interpretation of an agreement to which each is a party.'" ( Keating, supra, 31 Cal.3d at p. 609, fn. omitted.)

The Keating court recognized that "[w]ithout doubt a judicially ordered classwide arbitration would entail a greater degree of judicial involvement than is normally associated with arbitration, ideally '"a complete proceeding, without resort to court facilities."' [Citation.] The court would have to make initial determinations regarding certification and notice to the class, and if classwide arbitration proceeds it may be called upon to exercise a measure of external supervision in order to safeguard the rights of absent class members to adequate representation and in the event of dismissal or settlement. A good deal of care, and ingenuity, would be required to avoid judicial intrusion upon the merits of the dispute, or upon the conduct of the proceedings themselves and to minimize complexity, costs, or delay. [Citation.] [¶] An adhesion contract is not a normal arbitration setting, however, and what is at stake is not some abstract institutional interest but the interests of the affected parties." ( Keating, supra, 31 Cal.3d at p. 613.) Keating's endorsement of classwide arbitration has been echoed by subsequent Court of Appeal decisions. (See, e.g., Sanders v. Kinko's, Inc. (2002) 99 Cal.App.4th 1106 [121 Cal.Rptr.2d 766]; Blue Cross of California v. Superior Court (1998) 67 Cal.App.4th 42 [ 78 Cal.Rptr.2d 779].)

B. The Enforceability of Class Action Waivers Keating judicially authorized classwide arbitration in a case in which the arbitration agreement at issue was silent on the matter. It did not answer directly the question whether a class action waiver may be unenforceable as contrary to public policy or unconscionable. Recent cases have addressed that question. First, the Court of Appeal discussed the validity of a contractual class action waiver outside the arbitration context in America Online, Inc. v. Superior Court (2001) 90 Cal.App.4th 1 [ 108 Cal.Rptr.2d 699] ( America Online). Several former AOL subscribers alleged that AOL had continued to debit their credit cards for monthly service fees after their subscriptions had been canceled. ( Id. at p. 5.) The plaintiffs filed a class action lawsuit alleging violation of the Consumers Legal Remedies Act (CLRA) (Civ. Code, § 1750 et seq.), the Unfair Business Practices Act and several common law causes of action. The subscription contracts contained Virginia forum selection and choice-of-law provisions. Because Virginia law did not permit consumer class action lawsuits, those provisions were the "functional equivalent" of a waiver of class action lawsuits. (90 Cal.App.4th at p. 5.)

The America Online court held the forum selection and choice-of-law provisions to be unenforceable. As to the latter, the court stated: "'While "California does not have any public policy against a choice of law provision, where it is otherwise appropriate" [citation] and "choice of law provisions are usually respected by California courts . . ." [citation] "an agreement designating [a foreign] law will not be given effect if it would violate a strong California public policy . . . [or] 'result in an evasion of . . . a statute of the forum protecting its citizens.'" [Citation.]'" ( America Online, supra, 90 Cal.App.4th at p. 13, quoting Hall v. Superior Court (1983) 150 Cal.App.3d 411, 416-417 [ 197 Cal.Rptr. 757]; see also Nedlloyd Lines B.V. v. Superior Court (1992) 3 Cal.4th 459, 466 [ 11 Cal.Rptr.2d 330, 834 P.2d 1148] ( Nedlloyd) [an arm's length choice-of-law provision between commercial entities will not be enforced if it violates a fundamental California public policy and California has materially greater interests than the chosen state].)

The America Online court found in the CLRA a statute that overrode the choice-of-law provision. The court noted that the statute contained an antiwaiver provision, Civil Code section 1751, which states: "Any waiver by a consumer of the provisions of this title is contrary to public policy and shall be unenforceable and void." The court reasoned that following Virginia law would result in a waiver of the CLRA in light of the fact that the equivalent Virginia consumer protection statute, the Virginia Consumer Protection Act of 1977 (Va. Code Ann., § 59.1-196), was significantly weaker. ( America Online, supra, 90 Cal.App.4th at pp. 15-16.) Among the most important differences between the two statutes was the lack of a provision permitting class action relief in the Virginia statute. ( Id. at p. 17.) After quoting the passage in Vasquez, supra, 4 Cal.3d at page 808, regarding the importance of class actions in vindicating consumer rights quoted above ( ante, at p. 156), the court stated: "That this view has endured over the last 30 years is of little surprise given the importance class action consumer litigation has come to play in this state. In light of that history, we cannot accept AOL's assertion that the elimination of class actions for consumer remedies if the forum selection clause is enforced is a matter of insubstantial moment. The unavailability of class action relief in this context is sufficient in and by itself to preclude enforcement of the . . . forum selection clause." ( America Online, supra, 90 Cal.App.4th at pp. 17-18, fn. omitted.)

In Szetela, supra, 97 Cal.App.4th at page 1097, the court considered a class arbitration waiver. Plaintiff was a member of a class of credit cardholders seeking action against Discover Bank for improperly charging fees for exceeding their credit limits and imposing other penalties. He sued for breach of contract, breach of the covenant of good faith and fair dealing, fraudulent or negligent misrepresentation, and deceptive business practices. The arbitration clause and class arbitration waiver were very similar to those at issue in the present case. The trial court granted Discover Bank's motion for arbitration. Plaintiff recovered $29 in an individual arbitration and then appealed the trial court order compelling arbitration.

The court held that the class arbitration waiver was unenforceable. It first recognized that unconscionability was one reason to refuse to enforce an arbitration waiver. ( Szetela, supra, 97 Cal.App.4th at p. 1099.) It found procedural unconscionability in the adhesive nature of the contract. ( Id. at p. 1100.) The court also found substantive unconscionability in the imposition of a one-sided and oppressive class action waiver provision. "This provision is clearly meant to prevent customers, such as Szetela and those he seeks to represent, from seeking redress for relatively small amounts of money, such as the $29 sought by Szetela. Fully aware that few customers will go to the time and trouble of suing in small claims court, Discover has instead sought to create for itself virtual immunity from class or representative actions despite their potential merit, while suffering no similar detriment to its own rights. [¶] . . . The clause is not only harsh and unfair to Discover customers who might be owed a relatively small sum of money, but it also serves as a disincentive for Discover to avoid the type of conduct that might lead to class action litigation in the first place. By imposing this clause on its customers, Discover has essentially granted itself a license to push the boundaries of good business practices to their furthest limits, fully aware that relatively few, if any, customers will seek legal remedies, and that any remedies obtained will only pertain to that single customer without collateral estoppel effect. The potential for millions of customers to be overcharged small amounts without an effective method of redress cannot be ignored. Therefore, the provision violates fundamental notions of fairness. [¶] . . . This is not only substantively unconscionable, it violates public policy by granting Discover a 'get out of jail free' card while compromising important consumer rights." ( Szetela, supra, 97 Cal.App.4th at p. 1101; see also Ting v. ATT (9th Cir. 2003) 319 F.3d 1126, 1151 [concluding class action waivers in CLRA claim violated California law, relying in part on Szetela]; Ingle v. Circuit City Stores, Inc. (9th Cir. 2003) 328 F.3d 1165, 1176 [same].)

Turning to the present case, we note that plaintiff does not plead a CLRA cause of action and so does not invoke its antiwaiver provision; nor does he seek recovery under any other California statute as to which a class action remedy is essential. (See Armendariz v. Foundation Health Psychcare Services, Inc. (2000) 24 Cal.4th 83, 100-101 [ 99 Cal.Rptr.2d 745, 6 P.3d 669] ( Armendariz).) Rather, plaintiff contends that class action or arbitration waivers in consumer contracts, and in this particular contract, should be invalidated as unconscionable under California law.

(1) "To briefly recapitulate the principles of unconscionability, the doctrine has '"both a 'procedural' and a 'substantive' element," the former focusing on "'oppression'" or "'surprise'" due to unequal bargaining power, the latter on "'overly harsh'"' or "'one-sided'" results.' [Citation.] The procedural element of an unconscionable contract generally takes the form of a contract of adhesion, '"which, imposed and drafted by the party of superior bargaining strength, relegates to the subscribing party only the opportunity to adhere to the contract or reject it."' . . . [¶] Substantively unconscionable terms may take various forms, but may generally be described as unfairly one-sided." ( Little v. Auto Stiegler, Inc. (2003) 29 Cal.4th 1064, 1071 [ 130 Cal.Rptr.2d 892, 63 P.3d 979] ( Little), cert. den. sub nom. Auto Stiegler, Inc. v. Little (2003) 540 U.S. 818 [ 157 L.Ed.2d 35, 124 S.Ct. 83].)

We agree that at least some class action waivers in consumer contracts are unconscionable under California law. First, when a consumer is given an amendment to its cardholder agreement in the form of a "bill stuffer" that he would be deemed to accept if he did not close his account, an element of procedural unconscionability is present. ( Szetela, supra, 97 Cal.App.4th at p. 1100.) Moreover, although adhesive contracts are generally enforced ( Graham v. Scissor-Tail, Inc. (1981) 28 Cal.3d 807, 817-818 [ 171 Cal.Rptr. 604, 623 P.2d 165]), class action waivers found in such contracts may also be substantively unconscionable inasmuch as they may operate effectively as exculpatory contract clauses that are contrary to public policy. As stated in Civil Code section 1668: "All contracts which have for their object, directly or indirectly, to exempt anyone from responsibility for his own fraud, or willful injury to the person or property of another, or violation of law, whether willful or negligent, are against the policy of the law." (Italics added.)

(2) Class action and arbitration waivers are not, in the abstract, exculpatory clauses. But because, as discussed above, damages in consumer cases are often small and because "'[a] company which wrongfully exacts a dollar from each of millions of customers will reap a handsome profit'" ( Linder, supra, 23 Cal.4th at p. 446), "'the class action is often the only effective way to halt and redress such exploitation.'" ( Ibid.) Moreover, such class action or arbitration waivers are indisputably one-sided. "Although styled as a mutual prohibition on representative or class actions, it is difficult to envision the circumstances under which the provision might negatively impact Discover [Bank], because credit card companies typically do not sue their customers in class action lawsuits." ( Szetela, supra, 97 Cal.App.4th at p. 1101.) Such one-sided, exculpatory contracts in a contract of adhesion, at least to the extent they operate to insulate a party from liability that otherwise would be imposed under California law, are generally unconscionable.

We acknowledge that other courts disagree. Some courts have viewed class actions or arbitrations as a merely procedural right, the waiver of which is not unconscionable. (See, e.g., Strand v. U.S. Bank National Association ND (2005) 2005 ND 68 [ 693 N.W.2d 918, 926] ( Strand); Blaz v. Belfer (5th Cir. 2004) 368 F.3d 501, 504-505; Johnson v. West Suburban Bank (3d Cir. 2000) 225 F.3d 366, 369; Champ v. Siegel Trading Co., Inc. (7th Cir. 1995) 55 F.3d 269, 277; but see Leonard v. Terminex Intern. Co. L.P. (Ala. 2002) 854 So.2d 529, 538 [class action waiver together with limitation of damages clause in adhesive consumer arbitration agreement deprives plaintiffs of a "meaningful remedy" and is therefore unconscionable]; State v. Berger (2002) 211 W.Va. 549 [ 567 S.E.2d 265, 278] [holding contract provision limiting class action rights unconscionable]; Powertel v. Bexley (Fla.Dist.Ct.App. 1999) 743 So.2d 570, 576 [same].) But as the above cited cases of this court have continually affirmed, class actions and arbitrations are, particularly in the consumer context, often inextricably linked to the vindication of substantive rights. Affixing the "procedural" label on such devices understates their importance and is not helpful in resolving the unconscionability issue.

Nor are we persuaded by the rationale stated by some courts that the potential availability of attorney fees to the prevailing party in arbitration or litigation ameliorates the problem posed by such class action waivers. ( Strand, supra, 693 N.W.2d at p. 926; Snowden v. Checkpoint Check Cashing (4th Cir. 2002) 290 F.3d 631, 638.) There is no indication other than these courts' unsupported assertions that, in the case of small individual recovery, attorney fees are an adequate substitute for the class action or arbitration mechanism. Nor do we agree with the concurring and dissenting opinion that small claims litigation, government prosecution, or informal resolution are adequate substitutes.

(3) We do not hold that all class action waivers are necessarily unconscionable. But when the waiver is found in a consumer contract of adhesion in a setting in which disputes between the contracting parties predictably involve small amounts of damages, and when it is alleged that the party with the superior bargaining power has carried out a scheme to deliberately cheat large numbers of consumers out of individually small sums of money, then, at least to the extent the obligation at issue is governed by California law, the waiver becomes in practice the exemption of the party "from responsibility for [its] own fraud, or willful injury to the person or property of another." (Civ. Code, § 1668.) Under these circumstances, such waivers are unconscionable under California law and should not be enforced.

C. FAA Preemption of California Rules Against Class Action Waivers

1. The Court of Appeal Opinion

The Court of Appeal did not dispute the conclusions of America Online and Szetela that, at least under some circumstances, a class action waiver would be unconscionable or contrary to public policy. The court concluded, however, that when class action waivers are contained in arbitration agreements, California law prohibiting such waivers is preempted by section 2 of the FAA ( 9 U.S.C. § 2). We conclude the Court of Appeal erred.

(4) We begin by reviewing some basic principles pertaining to the enforcement of arbitration agreements. "California law, like federal law, favors enforcement of valid arbitration agreements. [Citation.]. . . . Thus, under both federal and California law, arbitration agreements are valid, irrevocable, and enforceable, save upon such grounds as exist at law or in equity for the revocation of any contract." ( Armendariz, supra, 24 Cal.4th at pp. 97-98, fn. omitted; see also 9 U.S.C. § 2; Code Civ. Proc., § 1281.) In other words, although under federal and California law, arbitration agreements are enforced "in accordance with their terms" ( Volt Info. Sciences v. Leland Stanford Jr. U. (1989) 489 U.S. 468, 478 [ 103 L.Ed.2d 488, 109 S.Ct. 1248] ( Volt)), such enforcement is limited by certain general contract principles "'at law or in equity for the revocation of any contract.'" ( Id. at p. 474.)

At the outset of our discussion, we note that the FAA is silent on the matter of class actions and class action arbitration. Indeed, not only is classwide arbitration a relatively recent development, but class action litigation for damages was for the most part unknown in federal jurisdictions at the time the FAA was enacted in 1925. (Act of Feb. 12, 1925, ch. 213, 43 Stat. 883.) The Congress that enacted the FAA therefore cannot be said to have contemplated the issues before us. Accordingly, our conclusions with respect to FAA preemption must come from the United States Supreme Court's articulation of general principles regarding such preemption.

In support of its conclusion, the Court of Appeal cited Perry v. Thomas (1987) 482 U.S. 483 [ 96 L.Ed.2d 426, 107 S.Ct. 2520] ( Perry), in which the United States Supreme Court concluded that section 2 of the FAA preempted California Labor Code section 229, which authorizes an action for the collection of wages "'without regard to the existence of any private agreement to arbitrate.'" ( Perry, supra, 482 U.S. at p. 484.) As Perry stated, the FAA "embodies Congress' intent to provide for the enforcement of arbitration agreements within the full reach of the Commerce Clause. Its general applicability reflects that '[t]he preeminent concern of Congress in passing the Act was to enforce private agreements into which parties had entered. . . .' . . . This clear federal policy places § 2 of the Act in unmistakable conflict with California's § 229 requirement that litigants be provided a judicial forum for resolving wage disputes. Therefore, under the Supremacy Clause, the state statute must give way." ( Perry, supra, 482 U.S. at pp. 490-491.)

The Court of Appeal observed that the court in Perry did not address whether the contract was unconscionable, because this issue had not been addressed in the lower courts. But while noting that the issue may be considered on remand, the Perry court clarified the limits the FAA imposed on the unconscionability defense: "We note . . . the choice-of-law issue that arises when defenses such as [plaintiff's] so-called 'standing' and unconscionability arguments are asserted. In instances such as these, the text of § 2 provides the touchstone for choosing between state-law principles and the principles of federal common law envisioned by the passage of that statute: An agreement to arbitrate is valid, irrevocable, and enforceable, as a matter of federal law [citation], 'save upon such grounds as exist at law or in equity for the revocation of any contract.' 9 U.S.C. § 2. . . . Thus state law, whether of legislative or judicial origin, is applicable if that law arose to govern issues concerning the validity, revocability, and enforceability of contracts generally. A state-law principle that takes its meaning precisely from the fact that a contract to arbitrate is at issue does not comport with this requirement of § 2. [Citations.] A court may not, then, in assessing the rights of litigants to enforce an arbitration agreement, construe that agreement in a manner different from that in which it otherwise construes nonarbitration agreements under state law. Nor may a court rely on the uniqueness of an agreement to arbitrate as a basis for a state-law holding that enforcement would be unconscionable, for this would enable the court to effect what we hold today the state legislature cannot." ( Perry, supra, 482 U.S. at pp. 492-493, fn. 9, italics omitted and added.) The Court of Appeal quoted the above language and also noted similar reasoning in the seminal case of Southland, supra, 465 U.S. at page 16, in which the Supreme Court held that a California statute prohibiting arbitration of certain claims under the Franchise Investment Law was preempted by the FAA.

Based on the above, the Court of Appeal concluded: "While a state may prohibit the contractual waiver of statutory consumer remedies, including the right to seek relief in a class action, such protections fall by the wayside when the waiver is contained in a validly formed arbitration agreement governed by the FAA. The antiwaiver provisions in statutes such as section 229 of the Labor Code . . . are preempted by section 2 of the FAA. Similarly, we conclude the antiwaiver language found in judicial decisions such as [ America Online] and Szetela also has been preempted by section 2 of the FAA."

(5) The Court of Appeal's conclusion is puzzling, because it ignores the critical distinction made by the Perry court between a "state-law principle that takes its meaning precisely from the fact that a contract to arbitrate is at issue," which is preempted by section 2 of the FAA, and a state law that "govern[s] issues concerning the validity, revocability, and enforceability of contracts generally," which is not. ( Perry, supra, 482 U.S. at p. 493, fn. 9.) "[U]nder section 2 of the FAA, a state court may refuse to enforce an arbitration agreement based on 'generally applicable contract defenses, such as fraud, duress, or unconscionability.'" ( Little, supra, 29 Cal.4th at p. 1079, quoting Doctor's Associates, Inc. v. Casarotto (1996) 517 U.S. 681, 687 [ 134 L.Ed.2d 902, 116 S.Ct. 1652].) In the present case, the principle that class action waivers are, under certain circumstances, unconscionable as unlawfully exculpatory is a principle of California law that does not specifically apply to arbitration agreements, but to contracts generally. In other words, it applies equally to class action litigation waivers in contracts without arbitration agreements as it does to class arbitration waivers in contracts with such agreements. (See America Online, supra, 90 Cal.App.4th at pp. 17-18.) In that important respect it differs from the provision under consideration in Perry, which singled out certain arbitration agreements as unenforceable.

The Court of Appeal also relied on statements found in Volt, supra, 489 U.S. 468. In Volt, the parties agreed to arbitrate under California law, which permitted a stay of arbitration proceeding while litigation was pending. (See Code Civ. Proc., § 1281.2, subd. (c).) Such a stay would not have been allowed under the relevant parts of the FAA. ( 9 U.S.C. §§ 3, 4; Volt, supra, 489 U.S. at pp. 471-472 fn. 2.) The Volt court rejected the federal preemption argument and affirmed the parties' right to structure their arbitration agreement according to California rules. It stated, in a passage quoted by the Court of Appeal below, that the FAA's "primary purpose [is to] [e]nsure that private agreements to arbitrate are enforced according to their terms. Arbitration under the Act is a matter of consent, not coercion, and parties are generally free to structure their arbitration agreements as they see fit. Just as they may limit by contract the issues which they will arbitrate [citation], so too may they specify by contract the rules under which that arbitration will be conducted." ( Volt, supra, 489 U.S. at p. 479.)

(6) The Court of Appeal in the present case concluded that, unlike in Volt, the imposition of class action arbitration despite a class action waiver in the arbitration agreement would defeat the purpose of the FAA because it would not be enforcing the arbitration agreement according to its terms. We disagree. Volt's dictum that the primary purpose of the FAA is to "ensur[e] that private agreements to arbitrate are enforced according to their terms" ( Volt, supra, 489 U.S. at p. 479) was intended to explain why the procedural rules provided in arbitration agreements should be enforced, rather than imposing the rules contained in the FAA. ( Volt, supra, at pp. 478-479.) Nothing in Volt, nor any other Supreme Court case, however, suggests that state courts are obliged to enforce contractual terms even if those terms are found to be unconscionable or contrary to public policy under general contract law principles. As discussed, section 2 of the FAA and cases interpreting it make clear that state courts have no such obligation. Agreements to arbitrate may not be used to "harbor terms, conditions and practices" that undermine public policy. ( Little, supra, 29 Cal.4th at p. 1079.)

Discover Bank cites various cases holding that the requirement of section 4 of the FAA, that federal district courts petitioned to compel arbitration will do so "in accordance with the terms of the agreement," precludes class action arbitration when the agreement does not provide for it. (See, e.g., Champ v. Siegel Trading Co., Inc., supra, 55 F.3d 269, 277.) But as we have recognized, section 4 does not apply to state court proceedings. ( Cronus Investments, Inc. v. Concierge Services, LLC (2005) 35 Cal.4th 376, 388-389 [ 25 Cal.Rptr.3d 540, 107 P.3d 217]; see Blue Cross of California v. Superior Court, supra, 67 Cal.App.4th 42, 62-64 [concluding that neither § 4 nor any other part of the FAA precludes classwide arbitration].) Aside from that, there is no suggestion that the quoted language in section 4 overrides the principle embodied in section 2 that state courts can refuse to enforce arbitration agreements or portions thereof based on general contract principles. As discussed, the FAA does not federalize the law of unconscionability or related contract defenses except to the extent that it forbids the use of such defenses to discriminate against arbitration clauses. (See Perry, supra, 482 U.S. at p. 493, fn. 9.) There is no such discrimination here with respect to California's rule against class action waivers.

The Court of Appeal opinion below also relied on the supposed shortcomings of arbitration to bolster its conclusion that a class action waiver is enforceable under the FAA. As the court stated: "Although California courts have recognized the consumer protection value of classwide arbitration, that is not the sole consideration. Courts should also consider the 'California rule which prevents reweighing the merits of an arbitrator's decision.' [Citation.] The FAA does not preempt this rule. [Citation.] As judicial review of the merits of an arbitrator's decision may not be had under California law, a multi-million dollar class arbitration award entered on nothing more than mere whim cannot be corrected under California law."

Far from holding that the invalidation of a class action waiver discriminates against arbitration, the Court of Appeal below reasoned in effect that arbitration is an inferior forum and therefore cannot be entrusted with classwide claims. The court's conclusion regarding the unsuitability of arbitration to class actions reflects, as we stated in the context of another proposed limitation on arbitration, "the very mistrust of arbitration that has been repudiated by the United States Supreme Court." ( Armendariz, supra, 24 Cal.4th at p. 120.) Moreover, as explained below, there is nothing to indicate that class action and arbitration are inherently incompatible.

2. Gilmer v. Interstate/Johnson Lane Corp.

Discover Bank and its amici curiae also argue that their position on FAA preemption is supported by language in Gilmer v. Interstate/Johnson Lane Corp. (1991) 500 U.S. 20 [ 114 L.Ed.2d 26, 111 S.Ct. 1647] ( Gilmer). In that case, the court considered whether the Age Discrimination in Employment Act of 1967 (ADEA; 29 U.S.C. § 621 et seq.) precluded arbitration of claims brought under that act. The court made clear that the inquiry was into congressional intent to preclude arbitration, discoverable through the language, legislative history, or through "an 'inherent conflict' between arbitration and the ADEA's underlying purposes." ( Gilmer, supra, 500 U.S. at p. 26.) The Gilmer court rejected the argument that there was such an inherent conflict because of the supposed lack of collective action mechanisms in the New York Stock Exchange arbitration rules under which the plaintiff's arbitration was being conducted. As the court stated: "The NYSE rules . . . provide for collective proceedings. [Citation.] But 'even if the arbitration could not go forward as a class action or class relief could not be granted by the arbitrator, the fact that the [ADEA] provides for the possibility of bringing a collective action does not mean that individual attempts at conciliation were intended to be barred.'" ( Gilmer, supra, 500 U.S. at p. 32.)

The above passage does not support Discover Bank's position. At most, the Gilmer court can be understood to mean that a party can still vindicate his or her rights under the ADEA even if no class action remedy is available. The ADEA is an employment discrimination statute in which large individual awards are commonplace. (See Carnahan, Removing the Scarlet A (Aug. 12, 2002) Forbes, at p. 78 [reporting that the median award in employee age discrimination suits is $269,000].) Under California law, classwide arbitration is only justified when "gross unfairness would result from the denial of opportunity to proceed on a classwide basis." ( Keating, supra, 31 Cal.3d at p. 613.)

Moreover, in Gilmer the plaintiff sought to use the supposed lack of a class action remedy as a reason for invalidating the entire arbitration agreement. In the present case, the enforceability of the arbitration agreement itself is not in question, only enforcement of the class action waiver. Gilmer's determination that the lack of class action remedies does not give rise to an inherent conflict between the ADEA and the FAA does not lend support to the proposition that the FAA categorically precludes states from enforcing arbitration-neutral rules that prohibit consumer class action waivers in some circumstances.

3. Green Tree Financial Corp. v. Bazzle

Discover Bank argues that Green Tree Financial Corp. v. Bazzle (2003) 539 U.S. 444 [ 156 L.Ed.2d 414, 123 S.Ct. 2402] ( Bazzle), issued after the filing of the Court of Appeal opinion, supports the position that a state law rule against class arbitration waivers is preempted by the FAA. We disagree.

In Bazzle, several customers sued Green Tree Financial Corp. (Green Tree), alleging that the company failed to provide them with a form informing them of their right to name their own lawyer and insurance agent, contrary to South Carolina law. They sought class certification, and Green Tree sought to compel arbitration pursuant to arbitration agreements with the plaintiffs. The trial court both certified a class action and entered an order compelling arbitration. Two class arbitration proceedings were conducted, and in both instances, the arbitrators awarded the class several million dollars in statutory damages. The trial court confirmed the awards. ( Bazzle, supra, 539 U.S. at pp. 448-449.) Green Tree challenged on appeal, among other things, the legality of the class arbitration. The South Carolina Supreme Court held that the arbitration agreements were silent with respect to classwide arbitration and that, under South Carolina law, silence would be construed to permit such arbitration. ( Id. at p. 450.)

The Bazzle court addressed a narrow question: Green Tree disputed whether the arbitration clause was silent on classwide arbitration, arguing that the contract language in fact prohibited such arbitrations. As the court's plurality framed the issue: "[W]e must deal with that argument at the outset, for if it is right, then the South Carolina court's holding is flawed on its own terms; that court neither said nor implied that it would have authorized class arbitration had the parties' arbitration agreement forbidden it." ( Bazzle, supra, 539 U.S. at p. 450 (plur. opn. of Breyer, J.).)

Even on this narrow issue, Bazzle produced no majority opinion. A plurality of four justices held that the question whether the contract was in fact silent on arbitration was for the arbitrator to decide, and remanded for an arbitral determination. As the plurality stated: "In certain limited circumstances, courts assume that the parties intended courts, not arbitrators, to decide a particular arbitration-related matter (in the absence of 'clea[r] and unmistakabl[e]' evidence to the contrary). [Citation.] These limited instances typically involve matters of a kind that 'contracting parties would likely have expected a court' to decide. [Citation.] They include certain gateway matters, such as whether the parties have a valid arbitration agreement at all or whether a concededly binding arbitration clause applies to a certain type of controversy. [Citations.] [¶] The question here whether the contracts forbid class arbitration does not fall into this narrow exception. It concerns neither the validity of the arbitration clause nor its applicability to the underlying dispute between the parties." ( Bazzle, supra, 539 U.S. at p. 452.)

Justice Stevens filed a concurring and dissenting opinion that stated in part: "The Supreme Court of South Carolina has held as a matter of state law that class-action arbitrations are permissible if not prohibited by the applicable arbitration agreement, and that the agreement between these parties is silent on the issue. [Citation.] There is nothing in the Federal Arbitration Act that precludes either of these determinations by the Supreme Court of South Carolina. See Volt Information Sciences, Inc. v. Board of Trustees of Leland Stanford Junior Univ., [ supra,] 489 U.S. 468, 475-476.

"Arguably the interpretation of the parties' agreement should have been made in the first instance by the arbitrator, rather than the court. [Citation.] Because the decision to conduct a class-action arbitration was correct as a matter of law, and because petitioner has merely challenged the merits of that decision without claiming that it was made by the wrong decisionmaker, there is no need to remand the case to correct that possible error. [¶] Accordingly, I would simply affirm the judgment of the Supreme Court of South Carolina. Were I to adhere to my preferred disposition of the case, however, there would be no controlling judgment of the Court. In order to avoid that outcome, and because JUSTICE BREYER's opinion expresses a view of the case close to my own, I concur in the judgment." ( Bazzle, supra, 539 U.S. at pp. 455-456 (conc. dis. opn. of Stevens, J.).)

Chief Justice Rehnquist, writing also for Justices Kennedy and O'Connor, would have held that the question whether the agreement is silent on classwide arbitration is for the court, rather than the arbitrator, to decide. ( Bazzle, supra, 539 U.S. at pp. 457-458 (dis. opn.).) The dissent viewed the choice of class arbitration as relating to the choice of arbitrator ( Bazzle, supra, 539 U.S. at p. 456) and concluded that this choice "is as important a component of the agreement to arbitrate as is the choice of what is to be submitted [for arbitration]." ( Id. at pp. 456-457.) On the merits, the Chief Justice would have decided the contract interpretation in Green Tree's favor, i.e., that the contract forbade class action arbitration and that such waiver is fully enforceable. ( Id. at pp. 458-459.)

Justice Thomas adhered to his previous view that the FAA does not apply to state court proceedings. ( Bazzle, supra, 539 U.S. at p. 460 (dis. opn. of Thomas, J.).)

Reading the plurality opinion together with Justice Stevens's opinion, the most that might be derived from Bazzle is a narrow holding: that when the question of whether a class action arbitration is available depends on whether or not the arbitration agreement is silent on the matter or expressly forbids class action arbitration, then it is up to the arbitrator, not the court, to determine whether the arbitration agreement is in fact silent.

More significant than Bazzle's holding, for purposes of the present case, is what it did not decide. The court did not address whether a state court can, consistent with the FAA, hold a class action waiver appearing in a contract of adhesion for arbitration unconscionable or contrary to public policy, as part of an arbitration-neutral law that finds all such waivers unenforceable. As noted, the plurality in framing the issue stated "that [the South Carolina Supreme Court] neither said nor implied that it would have authorized class arbitration had the parties' arbitration agreement forbidden it." ( Bazzle, supra, 539 U.S. at p. 450 (plur. opn. of Breyer, J.).) Under California law, as discussed, class arbitration may be authorized, even when a contract of adhesion forbids it, because a class arbitration waiver may be unconscionable. Bazzle does not call into question the principle that state courts may enforce general contract rules regarding unconscionability and public policy that preclude class action waivers.

Nor did the court address the question whether that determination of unconscionability should be made by a court or an arbitrator. The court was in general agreement that courts should be left to decide certain "gateway matters" ( Bazzle, supra, 539 U.S. at p. 452 (plur. opn. of Breyer, J.)) or "fundamental" matters such as the validity and scope of the arbitration agreement ( id. at pp. 456-457 (dis. opn. of Rehnquist, C.J.)). Under California law, the question whether "grounds exist for the revocation of the [arbitration] agreement" (Code Civ. Proc., § 1281.2) based on "grounds as exist for the revocation of any contract" ( id., § 1281) is for the courts to decide, not an arbitrator. (See Engalla v. Permanente Medical Group, Inc. (1997) 15 Cal.4th 951, 973 [ 64 Cal.Rptr.2d 843, 938 P.2d 903].) This includes the determination of whether arbitration agreements or portions thereof are deemed to be unconscionable or contrary to public policy. (See, e.g., Little, supra, 29 Cal.4th at p. 1076; Balandran v. Labor Ready, Inc. (2004) 124 Cal.App.4th 1522, 1530 [ 22 Cal.Rptr.3d 441] [question of unconscionability of arbitration agreement a gateway issue to be resolved by the court]; Miller v. Drexel Burnham Lambert, Inc. (11th Cir. 1986) 791 F.2d 850, 854; American General Finance, Inc. v. Branch (Ala. 2001) 793 So.2d 738, 743; In re Arbitration Between Teleserve Systems, Inc. MCI Telecommunications Corp. (N.Y.App.Div. 1997) 230 A.D.2d 585, 594 [ 659 N.Y.S.2d 659].) Nothing in Bazzle is to the contrary.

Amicus curiae United States Chamber of Commerce argues that the imposition of classwide arbitration undermines the purpose of the FAA by drastically altering the rules by which the parties agreed to arbitrate, transforming arbitration into a less efficient and less desirable mechanism of dispute resolution. Bazzle lends no support to that position. On the contrary, although Bazzle could have been disposed of easily if a majority had decided that arbitrations and class actions were inherently incompatible, and that class action arbitration therefore could not be instituted without an express agreement, the court did not take that route. The fact that a majority of the court looked to state law rules to determine whether class arbitration is authorized indicates its view that there is no such incompatibility. The only justice to comment directly on this issue, Justice Stevens, concluded that nothing in the FAA prohibits state courts from authorizing classwide arbitration in agreements silent on the matter. ( Bazzle, supra, 539 U.S. at pp. 454-455 (conc. opn. of Stevens, J.).)

Nor are we directed to anything concrete that would cause us to reconsider Keating's holding over 20 years ago that classwide arbitrations are workable and appropriate in some cases. (See Sternlight, As Mandatory Binding Arbitration Meets the Class Action, Will the Class-action Survive? (2000) 42 Wm. Mary L.Rev. 1, 38-44 fns. 148-151 [reporting, based on surveys of court decisions and discussions with attorneys, that class action arbitration is rare but viable, with trial courts acting to resolve class issues and other collateral matters]; see also Bazzle v. Green Tree Financial Corp. (2002) 351 S.C. 244 [ 569 S.E.2d 349, 360-361 fn. 22] [adopting the California approach to classwide arbitration and affirming its workability]; Dickler v. Shearson Lehman Hutton, Inc. (1991) 408 Pa.Super. 286 [ 596 A.2d 860, 862-863] [adopting classwide arbitration]; American Arb. Assn., Supplementary Rules for Class Arbitrations (Oct. 8, 2003) http://www.adr.org/sp.asp?id=21936 [as of June 27, 2005] [supplemental rules for classwide arbitration]; JAMS, Class Arbitration Procedures (Feb. 2005)http://www.jamsadr.com/rules/class_action.asp [as of June 27, 2005] [same].)

We reiterate what this court said over 20 years ago in Keating: "Classwide arbitration, as Sir Winston Churchill said of democracy, must be evaluated, not in relation to some ideal but in relation to its alternatives." ( Keating, 31 Cal.3d at p. 613.) We continue to believe that the alternatives — either not enforcing arbitration agreements and requiring class action litigation, or allowing arbitration agreements to be used as a means of completely inoculating parties against class liability — are unacceptable. Nothing in the FAA nor in Bazzle requires us to reconsider that assessment. (7) It may be the case that arbitration becomes a less desirable forum from Discover Bank's viewpoint if the arbitration must be conducted in a classwide manner. But the fact that a court's refusal to enforce an unconscionable term of an arbitration agreement makes that agreement less desirable to the party imposing the term does not argue in favor of its enforcement.

D. Choice-of-law Issue

Our holding that the FAA does not prohibit a California court from refusing to enforce a class action waiver that is unconscionable does not bring a resolution to this case. The agreement between Discover Bank and plaintiff has a Delaware choice-of-law agreement and Discover Bank argues that under Delaware law, a class arbitration waiver is enforceable. Because the Court of Appeal concluded that any California rule against class arbitrations waivers was preempted by the FAA, it did not address the question whether the Delaware choice-of-law provision requires the enforcement of the class arbitration waiver. It must do so on remand. For the Court of Appeal's guidance on remand, we offer these comments.

(8) We have summarized California's choice-of-law provisions as follows: "If the trial court finds that the . . . claims [at issue] fall within the scope of a choice-of-law clause, it must next evaluate the clause's enforceability pursuant to the analytical approach reflected in section 187, subdivision (2) of the Restatement Second of Conflict of Laws (Restatement). Under that approach, the court must first determine: '(1) whether the chosen state has a substantial relationship to the parties or their transaction, or (2) whether there is any other reasonable basis for the parties' choice of law. If neither of these tests is met, that is the end of the inquiry, and the court need not enforce the parties' choice of law. If, however, either test is met, the court must next determine whether the chosen state's law is contrary to a fundamental policy of California. If there is no such conflict, the court shall enforce the parties' choice of law. If, however, there is a fundamental conflict with California law, the court must then determine whether California has a 'materially greater interest than the chosen state in the determination of the particular issue. . . .' (Rest., § 187, subd. (2).) If California has a materially greater interest than the chosen state, the choice of law shall not be enforced, for the obvious reason that in such circumstance we will decline to enforce a law contrary to this state's fundamental policy.'" ( Washington Mutual Bank, supra, 24 Cal.4th at pp. 916-917, fns. and italics omitted.)

Assuming that Discover Bank establishes the "substantial relationship" and "reasonable basis" prongs of the choice-of-law analysis, and assuming that Delaware law regarding class arbitration waivers is contrary to California law, the court must then resolve whether and to what extent Delaware law should apply. As reviewed above, in America Online the court concluded that a Virginia choice-of-law provision that would have compelled waiver of the plaintiff's right to bring a class action lawsuit under the CLRA would not be enforced against a California resident, concluding that the CLRA class action remedy furthered a "strong public policy of this state." ( America Online, supra, 90 Cal.App.4th at p. 15.) The present case differs from America Online in that plaintiff is not invoking the antiwaiver provision of the CLRA, nor is he seeking to enforce an obligation imposed by the CLRA or any other California statute. Instead, he has brought this action under the Delaware Consumer Fraud Act and Delaware contract law, but seeks to enforce those Delaware laws in a California court with a California unconscionability rule against class action waivers that arguably is not found under Delaware law. Whether he may do so remains to be determined on remand. Also to be addressed is plaintiffs' argument that class arbitration rules are procedural rules that California courts are to apply even when the substantive law dictated by contract is from another state (see Rest.2d Conf. of Laws, supra, § 122), as well as any other choice-of-law arguments appropriately raised.

III. DISPOSITION

The judgment of the Court of Appeal is reversed, and the cause is remanded for proceedings consistent with this opinion.

George, C.J., Kennard, J., and Werdegar, J., concurred.