(a) The San Joaquin Corridor Joint Powers Agency may be established by agreement of the represented agencies for the purpose of assuming responsibility for intercity passenger rail services in the San Joaquin Corridor.
(b) The board shall be composed of the following 19 members:
(1) One member from the Capitol Corridor Joint Powers Board, if that board is in existence.
(2) One member from the County of Sacramento, appointed by the board of supervisors of that county.
(3) One member from the County of Los Angeles, appointed by the board of supervisors of that county.
(4) Two members each from the Counties of Fresno, Kern, Kings, Madera, Merced, San Joaquin, Stanislaus, and Tulare, appointed by the board of supervisors of the respective county. Each county shall appoint one member who is an elected official and one who is a private citizen.