---
kind: "unit"
title: "49"
title_heading: "Transportation"
key: "subtA/part40/subpartM"
level: "subpart"
label: "Subpart M"
heading: "Alcohol Confirmation Tests"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/49/subtA-part40-subpartM"
sections_count: 3
---

# Subpart M — Alcohol Confirmation Tests

Title 49 C.F.R. — Transportation › Subtitle A — Office of the Secretary of Transportation › Part 40 — Procedures for Transportation Workplace Drug and Alcohol Testing Programs

## Sections

- [§40.251. What are the first steps in an alcohol confirmation test?](/cfr/49/40.251.md)
- [§40.253. What are the procedures for conducting an alcohol confirmation test?](/cfr/49/40.253.md)
- [§40.255. What happens next after the alcohol confirmation test result?](/cfr/49/40.255.md)