Who should be in a DOT drug and alcohol testing program?

Essentially, Part 382 applies to those required to hold CDLs (or the Mexican or Canadian equivalent), and their employers. This means that, unlike most other safety regulations, FMCSA testing applies to both intrastate and interstate CMV drivers. So if a truck is large enough to require a CDL, the driver is subject to drug and alcohol testing even if driven a few miles per week and never crosses state lines. This could include a mechanic, dispatcher, warehouse worker, or any other occasional or fill-in driver.

Exemptions exist for those who are exempt from the CDL regulations, including certain farmers, military personnel, firefighters, and those operating CMVs on private property with controlled access.