California Business And Professions Code Section 1656

On and after January 1, 1985, every dentist licensed to practice dentistry in the state and any person working in a dentist`s office who operates dental radiographic equipment shall meet at least one of the following requirements: (a) Pass a course, approved by the board, in radiation safety which includes theory and clinical application in radiographic technique. The board shall require the courses to be taught by persons qualified in radiographic technique and shall adopt regulations specifying the qualifications for course instructors. (b) Have passed a radiation safety examination conducted by the board prior to January 1, 1985.