California Code, Vehicle Code - VEH § 31405

(a) Except as authorized under paragraph (1) of subdivision (e), every farm labor vehicle issued an inspection certificate under Section 31401shall be equipped at each passenger position with a Type 1 or Type 2 seatbelt assembly, conforming to the specifications set forth in Section 571.209 of Title 49 of the Code of Federal Regulations, that is anchored to the vehicle in a manner that conforms to the specifications of Section 571.210 of Title 49 of the Code of Federal Regulations.

(b) Except as authorized under paragraph (1) of subdivision (e), the department may not issue an initial inspection certificate under Section 31401 to any farm labor vehicle that is not equipped with a seatbelt assembly at each passenger position, as described in subdivision (a).

(c) The owner of a farm labor vehicle shall maintain all seatbelt assemblies and seatbelt assembly anchorages required under this section in good working order for the use of passengers.

(d) Except as authorized under paragraph (1) of subdivision (e) or subdivision (d) of Section 23116, no person may operate a farm labor vehicle on a highway unless that person and all passengers are properly restrained by a seatbelt assembly that conforms to this section.

(f) The department shall adopt regulations to implement this section.