California Code, Government Code - GOV § 7922.530

(a) Except with respect to public records exempt from disclosure by express provisions of law, each state or local agency, upon a request for a copy of records that reasonably describes an identifiable record or records, shall make the records promptly available to any person upon payment of fees covering direct costs of duplication, or a statutory fee if applicable.  Upon request, an exact copy shall be provided unless impracticable to do so.

(b) A requester who inspects a disclosable record on the premises of the agency has the right to use the requester's equipment on those premises, without being charged any fees or costs, to photograph or otherwise copy or reproduce the record in a manner that does not require the equipment to make physical contact with the record, unless the means of copy or reproduction would result in either of the following:

(c) The agency may impose any reasonable limits on the use of the requester's equipment that are necessary to protect the safety of the records or to prevent the copying of records from being an unreasonable burden to the orderly function of the agency and its employees.  In addition, the agency may impose any limit that is necessary to maintain the integrity of, or ensure the long-term preservation of, historic or high-value records.