Cal. Code Civ. Proc. § 526b
Every person or corporation bringing, instigating, exciting or abetting, any suit to obtain an injunction, restraining or enjoining the issuance, sale, offering for sale, or delivery, of bonds, or other securities, or the expenditure of the proceeds of the sale of such bonds or other securities, of any city, city and county, town, county, or other district organized under the laws of this state, or any other political subdivision of this state, proposed to be issued, sold, offered for sale or delivered by such city, city and county, town, county, district or other political subdivision, for the purpose of acquiring, constructing, completing, improving or extending water works, electric works, gas works or other public utility works or property, shall, if the injunction sought is finally denied, and if such person or corporation owns, controls, or is operating or interested in, a public utility business of the same nature as that for which such bonds or other securities are proposed to be issued, sold, offered for sale, or delivered, be liable to the defendant for all costs, damages and necessary expenses resulting to such defendant by reason of the filing of such suit.
Ca. Civ. Proc. Code § 526b