A registered dispensing optician shall not dispense a spectacle lens or contact lens prescription unless the prescription meets the requirements of Section 2541.1 or 2541.2, as applicable. A registered dispensing optician shall not dispense a spectacle lens prescription after the expiration date of the prescription unless so 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. 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.