California Code, Probate Code - PROB § 16352

(a) If a trust received property for which a gift or estate tax marital deduction was allowed and the settlor's spouse holds a mandatory income interest in the trust, the spouse may require the trustee, to the extent the trust assets otherwise do not provide the spouse with sufficient income from or use of the trust assets to qualify for the deduction, to do any of the following:

(b) The trustee may decide which action or combination of actions in subdivision (a) to take.