California Code, Government Code - GOV § 30402

(a) If a trustee is appointed pursuant to this chapter, all powers granted to the county board of supervisors, including, but not limited to, those powers granted by Section 29530.5, shall be withdrawn and delegated to the trustee. However, the trustee may provide for the continued exercise of all or specified powers by the board of supervisors. Further, the trustee shall oversee the pending case and may exercise the county's right to file a plan of adjustment.

(b) If at any time, in the discretion of the trustee, after consultation with (1) the specified county officers and the board of supervisors, (2) the Official Committee of Unsecured Creditors of the County of Orange appointed in the pending case, and (3) the Official Committee of Investment Pool Participants appointed in the investment pools case, the trustee determines that the continued exercise of specified powers by the board of supervisors is not conducive to the most effective action for resolving the pending case, the trustee shall reassume those powers.

(c) Upon termination of the emergency period specified in subdivision (g) of Section 30401 all powers otherwise granted to the board of supervisors shall revert to the board of supervisors.