Cal. Probate Code § 2257

(a) Except as provided in subdivision (b), the powers of a temporary guardian or temporary conservator terminate, except for the rendering of the account, at the earliest of the following times: (1) The time the temporary guardian or conservator acquires notice that a guardian or conservator is appointed and qualified. (2) Thirty days after the appointment of the temporary guardian or temporary conservator or such earlier time as the court may specify in the order of appointment. (b) With or without notice as the court may require, the court may for good cause order that the time for the termination of the powers of the temporary guardian or temporary conservator be extended or shortened pending final determination by the court of the petition for appointment of a guardian or conservator or pending the final decision on appeal therefrom or for other cause. The order which extends the time for termination shall fix the time when the powers of the temporary guardian or temporary conservator terminate except for the rendering of the account.