California Code, Probate Code - PROB § 2592

(a) The guardian or conservator may apply by petition for an order under Section 2590.

(b) The application for the order may be included in the petition for the appointment of the guardian or conservator. In such case, the notice of hearing on the petition shall include a statement that the petition includes an application for the grant of one or more powers under this article and shall list the specific power or powers applied for.

(c) If the application for the order is made by petition filed after the filing of the petition for the appointment of the guardian or conservator, notice of the hearing on the petition shall be given for the period and in the manner provided in Chapter 3 (commencing with Section 1460) of Part 1.