California Code, Health and Safety Code - HSC § 114390

(b)(1) For purposes of enforcement, any authorized enforcement officer may, during the facility's hours of operation and other reasonable times, enter, inspect, issue citations to, and secure any sample, photographs, or other evidence from a food facility, cottage food operation, or any facility suspected of being a food facility or cottage food operation, or a vehicle transporting food to or from a retail food facility, when the vehicle is stationary at an agricultural inspection station, a border crossing, or at any food facility under the jurisdiction of the enforcement agency, or upon the request of an incident commander.

(2) If a food facility is operating under an HACCP plan, the enforcement officer may, for the purpose of determining compliance with the plan, secure as evidence any documents, or copies of documents, relating to the facility's adherence to the HACCP plan. Inspection may, for the purpose of determining compliance with this part, include any record, file, paper, process, HACCP plan, invoice, or receipt bearing on whether food, equipment, or utensils are in violation of this part.

(3) The enforcement officer may, for the purpose of determining compliance with the gross annual sales requirements for operating a microenterprise home kitchen operation or a cottage food operation, require those operations to provide copies of documents related to determining gross annual sales.