Cal. Bus. & Prof. Code § 2555.6
(a) In addition to the board’s authority to deny an application for registration pursuant to Section 2555.5, the board, in its sole discretion, may issue a probationary registration to an applicant subject to terms and conditions, including, but not limited to, any of the following:
(1) Limiting practice to a supervised, structured environment in which the registrant’s activities shall be supervised by another optician registered by the board who is in good standing and is either of the following: