California Code, Business and Professions Code - BPC § 2559.1

(1) The individual is a duly registered spectacle lens dispenser as provided in Section 2559.2.

(2) The individual is an unregistered individual who performs the fitting and adjusting under the direct responsibility and supervision of a duly registered spectacle lens dispenser whose certificate of registration is then conspicuously and prominently displayed on the premises.

(1) A supervising registered spectacle lens dispenser was not physically present on the registered premises due to reasonably unanticipated circumstances, including, but not limited to, illness, injury, family emergency, or the supervising registered spectacle lens dispenser's termination or resignation, and reasonable action was taken to have another supervising registered spectacle lens dispenser be physically present on the registered premises.

(2) A supervising registered spectacle lens dispenser was not physically present due to a legally required employee meal or break period.