Cal. Rev. & Tax. Code § 2287.5
Whenever a local agency is formed without an election, there may be submitted to the agency declaring the formation, at the time of formation or within 30 days thereafter, consents to maximum property tax rate from all of the qualified voters of the local agency and, upon receipt of all consents, the maximum tax rate shall be declared approved by the agency declaring formation.
All consents to maximum tax rate shall be on forms provided by the agency declaring formation and shall contain substantially the language that would appear on the ballot if a maximum property tax rate election were to be held. Each consent shall show the name and address of the qualified voter, whose signature must be notarized. All consents shall be for the same maximum property tax rate. The county clerk shall verify the signatures on all consents and that the consents constitute all of the qualified voters in the local agency prior to a declaration of approval of the maximum property tax rate.
Ca. Rev. and Tax. Code § 2287.5