California Code, Business and Professions Code - BPC § 12210.3

(a) A county sealer who possesses the appropriate equipment to perform tests on water submeters shall inspect, test, and certify to the accuracy of a water submeter, within his or her county and upon written request of the owner, user, or operator of the water submeter, if any of the following circumstances exist:

(b) Notwithstanding Section 12210.5, the board of supervisors may authorize the sealer to establish, from time to time, a schedule of fees to cover the cost of services provided under subdivision (a) and to charge and collect the fees. The fee schedule shall be limited to the actual cost of performing those services.