Cal. Sts. & High. Code § 30866

When the cost of construction or erection and equipment of the bridge or ferry, or the fair cash value thereof, together with the cost of needed repairs and the conduct and maintenance thereof, is ascertained and fixed for the preceding year, the board shall on such ascertained amount fix the annual license tax, rate of tolls, and the amount of the penal bond, and direct a license to be issued by the clerk.