Cal. Penal Code § 11106.1

Any system of microphotography, optical disk, or reproduction by other techniques that do not permit additions, deletions, or changes to the original document, may be used by the Department of Justice as a photographic reproduction process to record some or all instruments, papers, photographs, and notices that are required or permitted by law to be recorded or filed. All storage medium shall comply with minimum standards of quality approved by the National Institute of Standards and Technology.