California Code, Government Code - GOV § 52031

(a) The governing bodies of any two or more cities or counties or any combination thereof may by agreement create an area energy authority.  Each governing body that is a party to such an agreement shall appoint two persons as commissioners of the authority, and the governing bodies shall jointly appoint one commissioner at large, and, upon appointment of all required commissioners, the area energy authority shall be authorized to exercise all of the powers which a community energy authority is authorized to exercise.

(b) Commissioners appointed pursuant to subdivision (a) shall serve at the pleasure of the governing bodies which appointed them.

(c) A majority of the commissioners of an area energy authority constitutes a quorum for the purpose of conducting business and exercising its powers and for all other purposes.  Action may be taken by the area energy authority upon a vote of a majority of the commissioners.

(d) The commissioners shall select a chairperson from their number.