California Code, Health and Safety Code - HSC § 102365

(a) Notwithstanding any other law, a local registrar of births and deaths, after two years from the date of registration and with the approval of, and under the supervision of, the State Registrar, shall dispose of the local registrar's copies of the records, if both of the following exist:

(b) Notwithstanding subdivision (a), a local health jurisdiction that exclusively serves cities may issue a record older than two years if the record issued is the most accurate record on file with the State of California.