What is the difference between 49CFR, DOT, and HM126F training?

49 CFR is where the regulations are located in sections 100 thru 180. DOT is the federal agency responsible for enforcing the regulations.  HM126F training was the original final rule in the Federal Register that required DOT hazmat training to be given.  However the training is actually under 49 CFR 172.700-706. 

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