California Code, Public Resources Code - PRC § 21189.85

(a) An action or proceeding brought to attack, review, set aside, void, or annul the certification of an environmental impact report for an infrastructure project subject to this chapter or the granting of any project approvals, including any potential appeals to the court of appeal or the Supreme Court, shall be resolved, to the extent feasible, within 270 days of the filing of the certified record of proceedings with the court.

(b) On or before December 31, 2023, the Judicial Council shall adopt a rule of court to implement this section.