California Code, Health and Safety Code - HSC § 102235

(a) One year has elapsed since the date of registration of the records.

(b) The birth, death, or marriage records have been reproduced onto microfilm or optical disk or by any other technique that does not permit additions, deletions, or changes to the original document in compliance with Section 12168.7 for recording of permanent records or nonpermanent records.

(c) Adequate provisions are made that the permanent storage medium reflects additions or corrections to the records.

(d) A permanent copy is maintained in a manner that permits it to be used for all purposes served by the original record.

(e) A permanent copy has been stored at a separate physical location in a place and manner that will reasonably assure its preservation indefinitely against loss or destruction.