Hazmat employee means: A person who is:
(i) Employed on a full-time, part time, or temporary basis by a hazmat employer and who in the course of such full time, part time or temporary employment directly affects hazardous materials transportation safety;
(ii) Self-employed (including an owner-operator of a motor vehicle, vessel, or aircraft) transporting hazardous materials in commerce who in the course of such self-employment directly affects hazardous materials transportation safety;
(iii) A railroad signalman; or
(iv) A railroad maintenance-of-way employee.
(2) This term includes an individual, employed on a full time, part time, or temporary basis by a hazmat employer, or who is self-employed, who during the course of employment:
(i) Loads, unloads, or handles hazardous materials;
(ii) Designs, manufactures, fabricates, inspects, marks, maintains, reconditions, repairs, or tests a package, container or packaging component that is represented, marked, certified, or sold as qualified for use in transporting hazardous material in commerce.
(iii) Prepares hazardous materials for transportation;
(iv) Is responsible for safety of transporting hazardous materials;
(v) Operates a vehicle used to transport hazardous materials.