(a) Except as provided in subdivision (b), this part does not apply where the decedent died before January 1, 1985, and the law applicable prior to January 1, 1985, continues to apply where the decedent died before January 1, 1985.
(b) Section 6412 applies whether the decedent died before, on, or after January 1, 1985.
(c) Where any of the following provisions is applied in a case where the decedent died before January 1, 1985, any reference in that provision to this part shall be deemed to be a reference to former Division 2 (commencing with Section 200) which was repealed by Section 19 of Chapter 842 of the Statutes of 1983:
(1) Section 377 of the Code of Civil Procedure.