(a) Except as modified by this chapter, the State hereby adopts, as the laws of Delaware governing motor carrier safety, the following parts of the Code of Federal Regulations, as published and as subsequently amended:
(b) Notwithstanding the adoption of the laws and regulations as indicated in subsection (a) of this section, no requirements under this chapter shall apply to any single vehicle or a vehicle in combination operated in intrastate commerce with a gross vehicle weight rating or gross vehicle weight of 26,000 pounds or less, except for:
(1) A vehicle being used to transport hazardous materials of a type or quality that requires the vehicle to be marked or placarded in accordance with the Federal Motor Carrier Safety Regulations; or
(2) A vehicle having a seating capacity of 16 or more persons.