California Code, Streets and Highways Code - SHC § 5371

To the assessment shall be attached a warrant, which shall be signed by the superintendent of streets, and countersigned by the mayor or the city clerk.  The warrant shall be substantially in the following form:

By virtue hereof, I (name of the superintendent of streets), of the City of ________, County of ________ (or County or City and County of ________), State of California, by virtue of the authority vested in me as said superintendent of streets, do authorize and empower (name of contractor) (his or their) agents or assigns, to demand and receive, the several assessments upon the assessment and diagram hereto attached and this shall be (his or their) warrant for the same.

Countersigned by (name of mayor or city clerk).