Cal. PROB § 3083

In any proceeding under this article, the court may, after notice and hearing, order the spouse who has the management or control of community property to pay from the community property such amount as the court determines is necessary to the support and maintenance of the conservatee spouse pending the determination of the petition under this article. An order made pursuant to this section does not prejudice the rights of the spouses or other interested parties with respect to any subsequent order which may be made under this article. Any order made under this section may be modified or revoked at any time except as to any amount that may have accrued prior to the date of filing of the petition to modify or revoke the order.