California Code, Elections Code - ELEC § 339

(a) “Precinct board” is the board appointed by the elections official to serve at a single precinct or a consolidated precinct.In an election conducted using vote centers, “precinct board” means the board appointed by the elections official to serve at a vote center.

(b) “Precinct board,” when used in relation to proceedings taking place after the polls have closed, likewise includes any substitutive canvassing and counting board that may have been appointed to take the place of the board theretofore serving.

(c) “Precinct board member” is a member of the precinct board and includes an election officer.