CA Veh Code Section 9401

(a)

Motor vehicles manufactured in or prior to 1936, are exempted from the payment of the weight fees provided for in Section 9400.

(b)

Notwithstanding subdivision (a), any person who owns and operates a commercial vehicle manufactured in or prior to 1936 which is registered to such person, may pay the appropriate weight fees, and the department shall issue license plates of the same type as are issued to vehicles which are required to pay weight fees for such vehicles.