DOT vs. Non-DOT Drug Testing

DOT testing is federal law for covered roles: the panel, the procedure, the MRO review of drug results, and the consequences are all fixed by 49 CFR Part 40 and the modal rules. Non-DOT testing is whatever your written company policy says it is, which is a freedom and a responsibility. Most employers with drivers also have staff outside the federal rule, and covering them means writing a policy and running a second, parallel program. The two must stay completely separate: 49 CFR 40.13 requires DOT tests to come first, bars the Federal custody and control form and alcohol testing form from any non-DOT test, and bars a DOT test on anyone who is not a DOT-regulated employee. This guide explains where the line sits, what changes on each side of it, and how one administrator can run both.