California Code, Probate Code - PROB § 5014

(a) Except as provided in subdivision (b), this chapter applies to a provision for a nonprobate transfer of community property on the death of a married person, regardless of whether the provision for transfer of the property was executed by the person, or written consent to the provision for transfer of the property was given by the person's spouse, before, on, or after January 1, 1993.

(b) Subdivision (c) of Section 5030 does not apply, and the applicable law in effect on the date of death does apply, to revocation of a written consent given by a spouse who died before January 1, 1993.