---
kind: "unit"
title: "49"
title_heading: "Transportation"
key: "subtA/part40"
level: "part"
label: "Part 40"
heading: "Procedures for Transportation Workplace Drug and Alcohol Testing Programs"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/49/subtA-part40"
sections_count: 190
---

# Part 40 — Procedures for Transportation Workplace Drug and Alcohol Testing Programs

Title 49 C.F.R. — Transportation › Subtitle A — Office of the Secretary of Transportation

## Contents

- [Subpart A — Administrative Provisions](/cfr/49/subtA-part40-subpartA.md)
- [Subpart B — Employer Responsibilities](/cfr/49/subtA-part40-subpartB.md)
- [Subpart C — Specimen Collection Personnel](/cfr/49/subtA-part40-subpartC.md)
- [Subpart D — Collection Sites, Forms, Equipment and Supplies Used in DOT Urine and Oral Fluid Collections](/cfr/49/subtA-part40-subpartD.md)
- [Subpart E — Specimen Collections](/cfr/49/subtA-part40-subpartE.md)
- [Subpart F — Drug Testing Laboratories](/cfr/49/subtA-part40-subpartF.md)
- [Subpart G — Medical Review Officers and the Verification Process](/cfr/49/subtA-part40-subpartG.md)
- [Subpart H — Split Specimen Tests](/cfr/49/subtA-part40-subpartH.md)
- [Subpart I — Problems in Drug Tests](/cfr/49/subtA-part40-subpartI.md)
- [Subpart J — Alcohol Testing Personnel](/cfr/49/subtA-part40-subpartJ.md)
- [Subpart K — Testing Sites, Forms, Equipment and Supplies Used in Alcohol Testing](/cfr/49/subtA-part40-subpartK.md)
- [Subpart L — Alcohol Screening Tests](/cfr/49/subtA-part40-subpartL.md)
- [Subpart M — Alcohol Confirmation Tests](/cfr/49/subtA-part40-subpartM.md)
- [Subpart N — Problems in Alcohol Testing](/cfr/49/subtA-part40-subpartN.md)
- [Subpart O — Substance Abuse Professionals and the Return-to-Duty Process](/cfr/49/subtA-part40-subpartO.md)
- [Subpart P — Confidentiality and Release of Information](/cfr/49/subtA-part40-subpartP.md)
- [Subpart Q — Roles and Responsibilities of Service Agents](/cfr/49/subtA-part40-subpartQ.md)
- [Subpart R — Public Interest Exclusions](/cfr/49/subtA-part40-subpartR.md)