DOT

Required every three years for all hazmat employees, which are defined as “a person (including a self-employed person) who: loads, unloads, or handles hazmat; tests, reconditions, repairs, modifies, marks, or otherwise represents packaging 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” as defined by 49 CFR 172.700 - 172.704.