California Evidence Code Section 1550
(a) If made and preserved as a part of the records of a
business, as defined in Section 1270, in the regular course of that
business, the following types of evidence of a writing are as
admissible as the writing itself:
(1) A nonerasable optical image reproduction or any other
reproduction of a public record by a trusted system, as defined in
Section 12168.7 of the Government Code, if additions, deletions, or
changes to the original document are not permitted by the technology.
(2) A photostatic copy or reproduction.
(3) A microfilm, microcard, or miniature photographic copy,
reprint, or enlargement.
(4) Any other photographic copy or reproduction, or an enlargement
(b) The introduction of evidence of a writing pursuant to
subdivision (a) does not preclude admission of the original writing
if it is still in existence. A court may require the introduction of
a hard copy printout of the document.