Probate Code § 21403

21403.

(a) Subject to subdivision (b), shares of beneficiaries abate pro rata within each class specified in Section 21402.

(b) Gifts of annuities and demonstrative gifts are treated as specific gifts to the extent they are satisfied out of the fund or property specified in the gift and as general gifts to the extent they are satisfied out of property other than the fund or property specified in the gift.