Cal. Pub. Util. Code § 29292
Any person who, without probable cause, institutes in any court, state or federal, any action or proceeding contesting the validity of the issuance or sale by the district of any bonds or other evidences of indebtedness authorized by this part, and who does not prevail in such action or proceeding, shall be liable in damages to the district, in an amount which will compensate the district for all the detriment proximately caused thereby, or which, in the ordinary course of things, would be likely to result therefrom. He shall also be liable for the costs and attorney's fees paid or incurred in the defense of the action or proceeding. No proceeding contesting the validity of the issuance or sale by the district of any bonds or other evidences of indebtedness authorized by this part shall be instituted following the expiration of 60 days from and after the date of the election authorizing the issuance of the bonds or, in the case of indebtedness for which an election is not required, 60 days from and after the date of the resolution of the board authorizing the issuance of the indebtedness involved.
Ca. Pub. Util. Code § 29292