Cal. Harb. & Nav. Code § 6240.3

(a) The Stockton Port District shall be governed by a board of port commissioners consisting of seven members who shall have the qualifications prescribed by Section 6244. Three of the commissioners shall be appointed by the Board of Supervisors of San Joaquin County and four of the commissioners shall be appointed by the City Council of the City of Stockton.
(b) Commissioners may be removed from office during their term at pleasure by a two-thirds vote of the appointing authority.
(c) The terms of members of the board of port commissioners in office on the effective date of this section shall expire on the succeeding calendar day. Within 10 days thereafter, members of the board of port commissioners shall be appointed in the manner prescribed by subdivision (a). The terms of office of the members of the board of port commissioners shall be four years from the time of appointment, unless removed from office during their term pursuant to subdivision (b), except that the commissioners first appointed shall classify themselves by lot, so that the terms of such initial members shall expire, as follows:
1. (1) One member January 15, 1975.
2. (2) Two members January 15, 1976.
3. (3) Two members January 15, 1977.
4. (4) Two members January 15, 1978.
(d) At the first meeting of the board of port commissioners, the board shall organize by electing one of its members chairman. The members of the board of port commissioners shall annually elect a chairman. A chairman shall not succeed himself in office.