Section 56124 Of Chapter 3. Introductory And General Provisions From California Government Code >> Division 3. >> Title 5. >> Part 1. >> Chapter 3.

. If a proposed change of organization or a reorganization applies to two or more affected counties, for purposes of this division, exclusive jurisdiction may be vested in the commission of an affected county other than the commission of the principal county if all of the following occur:
  (a) The commission of the principal county approves of having exclusive jurisdiction vested in another affected county.
  (b) The commission of the principal county designates the affected county which shall assume exclusive jurisdiction.
  (c) The commission of the affected county so designated agrees to assume exclusive jurisdiction. If exclusive jurisdiction is vested in the commission of an affected county other than the principal county pursuant to this section, any notices, proceedings, orders, or any other acts authorized or required to be given, taken, or made by the commission, board of supervisors, clerk of a county, or any other officer of a county, shall be given, taken, or made by the persons holding those offices in the affected county. Any officer of a county other than the affected county shall cooperate with the commission of the affected county and shall furnish the commission of the affected county with any certificates, records, or certified copies of records as may be necessary to enable the commission of the affected county to comply with this division.