Cal. Welf. & 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.