Material of trade
Material of trade means a hazardous material, other than a hazardous waste, that is carried on a motor vehicle -
(1) For the purpose of protecting the health and safety of the motor vehicle operator or passengers;
(2) For the purpose of supporting the operation or maintenance of a motor vehicle (including its auxiliary equipment); or
(3) By a private motor carrier (including vehicles operated by a rail carrier) in direct support of a principal business that is other than transportation by motor vehicle.