This includes:

an owner-operator of a motor vehicle which transports hazmat

and

a person (including a self-employed person) who:

• loads, unloads, or handles hazmat;
• tests, reconditions, repairs, modifies, marks, or otherwise represents packagings as qualified for use in the transportation of hazmat;
• prepares hazmat for transportation;
• is responsible for safety of transporting hazmat; or
• operates a vehicle used to transport hazmat.