Cal. Probate Code - PROB § 10850. Section 10850.
(a)
This part does not apply in any proceeding for administration of a decedent’s estate commenced before July 1, 1991.
(b)
Notwithstanding its repeal, the applicable law in effect before July 1, 1991, governing the subject matter of this part continues to apply in any proceeding for administration of a decedent’s estate commenced before July 1, 1991.