California Code, Streets and Highways Code - SHC § 32657

(a) Three of the members first appointed shall be designated by the mayor, with the approval of the legislative body, to serve for terms of one, two, and three years, respectively, from a date specified by the mayor in their appointments, and two shall be designated to serve for terms of four years from that date. Thereafter, members shall be appointed for a term of four years. All vacancies occurring during a term shall be filled for the unexpired term. A member shall hold office until his or her successor has been appointed and has qualified.

(b) Notwithstanding subdivision (a), in any charter city having a parking and traffic commission created by the city's charter, the mayor, with the approval of the legislative body, may require the members of that commission to serve ex officio as members of the parking authority and to exercise all the powers and duties thereof. Upon the appointment of persons as commissioners of the city's parking and traffic commission, those commissioners shall replace the members of a parking authority appointed pursuant to subdivision (a) and shall succeed to the powers and duties of those members as provided in this chapter.

(c) Notwithstanding subdivisions (a) and (b) or Section 32656, in any charter city having a board of directors of a public transportation agency created by the city's charter, five or more members of the board of directors may serve ex officio as members of the parking authority and exercise all the powers and duties thereof during their terms as members of the board of directors. Persons appointed as members of the public transportation agency's board of directors may replace the members of a parking authority appointed pursuant to subdivision (a) or (b) and may succeed to the powers and duties of those members as provided in the city's charter.