California Code, Labor Code - LAB § 141

(a) The terms of office of the members of the board shall be four years and they shall hold office until the appointment and qualification of a successor. The terms of the members of the board first appointed shall expire as follows: three members, one representative from management, one representative from labor, and one representative from occupational health, on June 1, 1974; three members, one representative from management, one representative from labor, and one representative from occupational safety, on June 1, 1975; one member June 1, 1976. The terms shall thereafter expire in the same relative order. Vacancies occurring shall be filled by appointment to the unexpired term.

(b) Each member of the board shall receive one hundred dollars ($100) for each day of his or her actual attendance at meetings of the board, and other official business of the board, and his or her actual and necessary traveling expenses incurred in the performance of his or her duty as a member.