Section 21406 Of Part 4. Abatement From California Probate Code >> Division 11. >> Part 4.

. (a) This part does not apply to a gift made before July 1, 1989. In the case of a gift made before July 1, 1989, the law that would have applied had this part not been enacted shall apply.
  (b) For purposes of this section a gift by will is made on the date of the decedent's death.