Cal. Harb. & Nav. Code § 1151

Each member of the board shall be a citizen of the United States and a resident of California. Each member appointed pursuant to paragraphs (1) and (3) of subdivision (a) of Section 1150 shall be a resident of one of the following counties: San Francisco, Alameda, Contra Costa, Marin, Mendocino, Monterey, Sacramento, San Mateo, Santa Clara, Santa Cruz, Solano, San Joaquin, Napa, Sonoma, or Yolo. The member shall hold office during the pleasure of the power appointing the member, not to exceed four years from the date of the member’s commission.