In a civil case, the Supreme Court may direct the Court of Appeal to award costs, if any; or may order the parties to bear their own costs; or may make any other award of costs the Supreme Court deems proper. The Supreme Court may impose sanctions on a party or an attorney under rule 8.276 for committing any unreasonable violation of these rules.
Cal. R. Ct. 8.544
Advisory Committee Comment
If the Supreme Court makes an award of costs, the party claiming such costs must proceed under rule 8.278(c).