California Code, Vehicle Code - VEH § 5016.5

(a) The department may issue a special identification plate or other suitable device to a manufacturer or dealer of special construction equipment, special mobile equipment, cemetery equipment, tow dolly, logging vehicle, or implement of husbandry upon payment of the fee specified in subdivision (b) of Section 9261. The identification plate or other suitable device shall be of a size, color, and configuration determined by the department. The form of the application shall also be determined by the department.

(b) A manufacturer or dealer of special construction equipment, special mobile equipment, cemetery equipment, any tow dolly, any logging vehicle, or any implement of husbandry may operate or move such equipment or vehicle upon the highways during the delivery of or during the demonstration for the sale of such piece of equipment or vehicle upon condition that any such equipment or vehicle display thereon an identification plate or other suitable device issued to such manufacturer or dealer; provided, that special permits have been obtained in accordance with the provisions of Article 6 (commencing with Section 35780) of Chapter 5 of Division 15 for the operation or movement of any such equipment or vehicle of a size, weight, or load exceeding the maximum specified in this code.