This Federal rule covers both, drivers of CMVs in interstate commerce, and also any drivers who operate a vehicle transporting a quantity of hazardous materials requiring placarding under 49 CFR Part 172 or any quantity of a material listed as a select agent or toxin in 42 CFR part 73. If a CMV driver is employed by a State or a political subdivision of a State (e.g. county, city, township, etc.), FMCSA safety regulations do not apply, even if the driver is engaged in interstate transportation. But if a CMV driver employed by a State or a political subdivision of a State is operating a vehicle that requires a CDL, the applicable State traffic laws would govern (e.g., Maryland’s prohibition on the use of hand-held phones). The States have 3 years to implement by State law the disqualification provision.
