Cal. Welf. and Inst. Code § 6008
For the purposes of this part, a person who is a conservatee with a conservator of the person or of the person and estate appointed under Chapter 3 (commencing with Section 5350) of Part 1 of Division 5 with the right as specified by court order under Section 5358 to place his conservatee in a hospital of the United States government, may be admitted to such a hospital upon written application made by his conservator. A conservatee so admitted to such a hospital may leave the hospital at any time after his conservator gives notice to a member of the hospital staff that the conservatee is leaving and normal hospitalization departure procedures are completed by the conservator or by the conservator and conservatee.
Ca. Welf. and Inst. Code § 6008