Cal. Health & Safety Code § 17052
The enforcement agency shall annually enter and inspect, and reinspect as necessary, all employee housing accommodations for compliance with the provisions of this part and regulations adopted pursuant to this part, except:
(d) Accommodations for employee housing inspected in the prior calendar year with no violations identified or complaints received by the enforcement agency, which shall be inspected at least biennially.
The enforcement agency shall make every effort to complete the inspection prior to the occupancy of the employee housing.