Cal. PROB § 2553

(a) Except as provided in Section 2555, leases may be executed by the guardian or conservator with respect to the property of the estate only after authorization by order of the court.

(b) To obtain an order under this section, the guardian or conservator or any interested person may file a petition with the court. The petition shall state (1) a general description of the property proposed to be leased, (2) the term, rental, and general conditions of the proposed lease, and (3) the advantage to the estate to accrue from giving the lease. If the lease is proposed to be for a term longer than 10 years, the petition shall also state facts showing the need for the longer lease and its advantage to the estate. 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.

(c) At the hearing, the court shall entertain and consider any other offer made in good faith at the hearing to lease the same property on more favorable terms. If the court is satisfied that it will be to the advantage of the estate, the court shall make an order authorizing the guardian or conservator to make the lease to the person and on the terms and conditions stated in the order. The court shall not make an order authorizing the guardian or conservator to make the lease to any person other than the lessee named in the petition unless the offer made at the hearing is acceptable to the guardian or conservator.

(d) Jurisdiction of the court to administer the estate of the ward or conservatee is effectual to vest the court with jurisdiction to make the order for the lease. This jurisdiction shall conclusively inure to the benefit of the lessee and the lessee’s heirs and assigns. No omission, error, or irregularity in the proceedings shall impair or invalidate the proceedings or the lease made pursuant to an order made under this article.