Q. When are drivers subject to the DOT Drug & Alcohol Testing requirements?

A.  All drivers that operate a commercial motor vehicle, as defined in 49 CFR §382.107, which requires a driver holding a commercial driver’s license, are subject to the Drug and Alcohol testing requirements in 49 CFR Parts 40 and 382. (See 49 CFR §383.3). This includes, but is not limited to: full time, regularly-employed drivers; casual, intermittent or occasional drivers; leased drivers and independent owner-operator contractors.