Section 63.868 - Delegation of authority(a) In delegating implementation and enforcement authority to a State under section 112(d) of the Clean Air Act, the authorities contained in paragraph (b) of this section must be retained by the Administrator and not transferred to a State.(b) The authorities which will not be delegated to States are listed in paragraphs (b)(1) through (4) of this section:(1) Approval of alternatives to standards in § 63.862 under § 63.6(g) .(2) Approval of a major change to test method under § 63.7(e)(2)(ii) and (f) and as defined in § 63.90 .(3) Approval of a major change to monitoring under § 63.8(f) and as defined in § 63.90 .(4) Approval of a major change to recordkeeping/reporting under § 63.10(f) and as defined in § 63.90 .66 FR 3193, Jan. 12, 2001, as amended at 82 FR 47353, Oct. 11, 2017