California Code, Business and Professions Code - BPC § 2559.2

(a) An individual shall apply for registration as a registered spectacle lens dispenser on forms prescribed by the board. The board shall register an individual as a registered spectacle lens dispenser upon satisfactory proof that the individual has passed the registry examination of the American Board of Opticianry or any successor agency to that board. In the event the board should determine, after hearing, that the registry examination is not appropriate to determine entry level competence as a spectacle lens dispenser or is not designed to measure specific job performance requirements, the board may thereafter prescribe or administer a written examination that meets those specifications. If an applicant for renewal has not engaged in the full-time or substantial part-time practice of fitting and adjusting spectacle lenses but has maintained their American Board of Opticianry and National Contact Lens Examiners registration or practiced within another state within the last three years then the board may require the applicant to take and pass the examination referred to in this section as a condition of registration. Any examination prescribed or administered by the board shall be given at least twice each year on dates publicly announced at least 90 days before the examination dates. The board is authorized to contract for administration of an examination.

(b) The board may deny registration where there are grounds for denial under the provisions of Division 1.5 (commencing with Section 475).

(c) The board shall issue a certificate to each qualified individual stating that the individual is a registered spectacle lens dispenser.

(d) A registered spectacle lens dispenser is authorized to fit and adjust spectacle lenses at any place of business holding a certificate of registration under Section 2564.93 or at any location where the practice of ophthalmology or optometry is practiced. The certificate of the registered spectacle lens dispenser shall be displayed in a conspicuous place at the place of business where the registered dispenser is fitting and adjusting.