A voluntary adult patient may leave the hospital or institution at any time by giving notice of his desire to leave to any member of the hospital staff and completing normal hospitalization departure procedures. A conservatee may leave in a like manner if notice is given by his conservator.
A minor person who is a voluntary patient may leave the hospital or institution after completing normal hospitalization departure procedures after notice is given to the superintendent or person in charge by the parents, or the parent, guardian, or other person entitled to the custody of the minor, of their desire to remove him from the hospital.
Ca. Welf. and Inst. Code § 6005