California Code, Water Code - WAT § 36255

At any time not later than the hour set for hearing objections to the proposed plan of works and the issuance of general obligation bonds therefor, any owner of property liable to be assessed therefor may make written protest.  Such protest shall be in writing, shall contain a description of the property in which each signer has an interest, sufficient to identify the same and if the signers are not shown on the last equalized assessment roll as the owners of such property, such protest shall contain or be accompanied by written evidence that such signers are the owners of such property.  All such protests shall be delivered to the secretary of the district.