Health & Saf. Code, § 114356

(a) Notwithstanding Section 114047, during periods of operation, supplies and nonpotentially hazardous food, in unopened containers may be stored adjacent to the temporary food facility or in unopened containers in an approved nearby temporary storage unit. An “unopened container” means a factory sealed container that has not been previously opened and that is suitably constructed to be resistant to contamination from moisture, dust, insects, and rodents.

(b) During periods of inoperation, food shall be stored within a fully enclosed temporary food facility, within a permanent food facility or other facility approved by the enforcement agency, or in approved food compartments where the food is protected at all times from contamination, exposure to the elements, ingress of rodents and other vermin, and temperature abuse.