Cal. Prob. Code § 3080

If one spouse has a conservator and the other spouse has the management or control of community property, the conservator or conservatee, a relative or friend of the conservatee, or any interested person may file a petition under this article in the court in which the conservatorship proceeding is pending for an order requiring the spouse who has the management or control of community property to apply the income or principal, or both, of the community property to the support and maintenance of the conservatee as ordered by the court.