(a) Subject to Section 114765 of the Health and Safety Code, any vehicle transporting any explosive, blasting agent, flammable liquid, flammable solid, oxidizing material, corrosive, compressed gas, poison, radioactive material, or other hazardous materials, of the type and in quantities that require the display of placards or markings on the vehicle exterior by the United States Department of Transportation regulations (49 C.F.R., Parts 172, 173, and 177), shall display the placards and markings in the manner and under conditions
prescribed by those regulations of the United States Department of Transportation.
(b) This section does not apply to the following:
(1) Any vehicle transporting not more than 20 pounds of smokeless powder or not more than five pounds of black sporting powder or any combination thereof.
(2) An authorized emergency vehicle as defined in paragraph (1) of subdivision (b) of Section 165, operated by a peace officer as defined in Sections 830.1 and 830.2 of the Penal Code, when transportation is required within the scope and course of law enforcement explosives detection or removal duties, provided one of the following conditions applies:
(A) The law enforcement agency operating the vehicle complies with regulations adopted by the California Highway Patrol
pursuant to subdivision (b) of Section 34501, notwithstanding Section 34500 and subdivision (a) of Section 34501.
(B) The peace officer possesses an exemption issued by the commissioner, who may require additional transportation restrictions as deemed appropriate.