Labor Code § 7304
CHAPTER 2. Elevators, Escalators, Platform and Stairway Chair Lifts, Dumbwaiters, Moving Walks, Automated People Movers, and Other Conveyances
(a) Except as provided in subdivision (b), the division shall cause all conveyances to be inspected at least once each year. If a conveyance is found upon inspection to be in a safe condition for operation, a permit for operation for not longer than one year shall be issued by the division.
(b) If a conveyance is subject to a full maintenance service contract, the division may, after investigation and inspection, issue a permit for operation for not longer than two years.