California Code, Government Code - GOV § 12237

(a) Notwithstanding any provision of Division 10 (commencing with Section 7920.000) of Title 1, any provision of law that exempts from public disclosure any item in the custody of the State Archives shall not apply to that item 75 years after the item was created, irrespective of the origin of the item, the manner in which it was deposited with the State Archives, or any other condition or circumstance at the time the item was deposited.

(b) Subdivision (a) shall apply to any item currently in the custody of the State Archives and any item deposited in the State Archives after the effective date of this section.

(c) The State Archives shall notify any party who deposits any item in the State Archives after the effective date of this section of the provisions of subdivision (a).

(d) The Secretary of State's internet website shall include a public notice stating that on or after January 1, 2005, all items 75 years old or older that are on deposit in the State Archives shall be accessible to the public.