California Code, Business and Professions Code - BPC § 12515

(a) Any person having made repairs or adjustments to any weighing instrument or to any measuring instrument, or any person having sold, rented, leased, loaned, or installed any such instrument, who within 24 hours after the instrument has been sold, rented, leased, loaned, installed, repaired, or adjusted, fails to notify the sealer of the county in which the instrument has been sold, rented, leased, loaned, installed, repaired, or adjusted, that the sale, rent, lease, loan, installation, repair, or adjustment has been made, is guilty of a misdemeanor.

(b) This section does not require notification to the sealer for an adjustment to a weighing or measuring instrument only for the purpose of maintaining it in a zero or balance condition.