Cal. Civ. Proc. Code § 341.5

Notwithstanding any other provision of law, any action or proceeding in which a county, city, city and county, school district, special district, or any other local agency is a plaintiff or petitioner, that is brought against the State of California challenging the constitutionality of any statute relating to state funding for counties, cities, cities and counties, school districts, special districts, or other local agencies, shall be commenced within 90 days of the effective date of the statute at issue in the action. For purposes of this section, “State of California” means the State of California itself, or any of its agencies, departments, commissions, boards, or public officials.