CA Bus & Prof Code Section 2559.6

No spectacle lens prescription that is issued on or after January 1, 1999, shall be dispensed unless the prescription meets the requirements of Section 2541.1. No spectacle lens prescription shall be dispensed after the expiration date of the prescription unless authorized pursuant to subdivision (e) of Section 2541.1. A person violating this section shall not be guilty of a misdemeanor pursuant to Section 2558. A violation of this section shall be considered unprofessional conduct by the board that issued the dispenser’s certificate to practice. A registered dispensing optician may defend this proceeding by establishing that the expiration date of the prescription was not established consistent with Section 2541.1. Nothing in this section shall be construed to authorize a registered dispensing optician to fill a prescription after the expiration date or to make any judgment regarding the appropriateness of the expiration date.