---
kind: "unit"
title: "49"
title_heading: "Transportation"
key: "subtA/part40/subpartP"
level: "subpart"
label: "Subpart P"
heading: "Confidentiality and Release of Information"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/49/subtA-part40-subpartP"
sections_count: 7
---

# Subpart P — Confidentiality and Release of Information

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

- [§40.321. What is the general confidentiality rule for drug and alcohol test information?](/cfr/49/40.321.md)
- [§40.323. May program participants release drug or alcohol test information in connection with legal proceedings?](/cfr/49/40.323.md)
- [§40.325. Reserved](/cfr/49/40.325.md)
- [§40.327. When must the MRO report medical information gathered in the verification process?](/cfr/49/40.327.md)
- [§40.329. What information must laboratories, MROs, and other service agents release to employees?](/cfr/49/40.329.md)
- [§40.331. To what additional parties must employers and service agents release information?](/cfr/49/40.331.md)
- [§40.333. What records must employers keep?](/cfr/49/40.333.md)