Cal. VEH § 31601

(a) This division shall apply to the operation of any motor vehicle on any highway, and to the operation and parking of any vehicle on any property designated pursuant to this division as a safe stopping place for the purpose of transporting any explosive in any amount when the transportation is rendered as a delivery service or for hire, or in any other event for the purpose of transporting any explosive or a combined load of any explosive and ammonium nitrate-fuel oil mixture (blasting agent) in an amount in excess of 1,000 pounds. The transportation of quantities of explosives of 1,000 pounds or less, or other than on a public highway, is governed by Division 11 (commencing at Section 12000) of the Health and Safety Code. Notwithstanding other provisions of this section, a license required by Section 31602 may be used to transport quantities of less than 1,000 pounds of explosives if all other requirements of this division are met.

(b) It is the legislative intention in enacting this division and with particular reference to requiring licenses for transportation of explosives as set forth herein that such provisions shall apply uniformly throughout the State of California and that such license to be obtained from the Department of the California Highway Patrol, as provided in Chapter 2.5 (commencing with Section 2500) of Division 2, shall be in lieu of any requirement for any license to be obtained by any such owner from any local authority within the state.