---
kind: "unit"
title: "49"
title_heading: "Transportation"
key: "subtA/part40/subpartQ"
level: "subpart"
label: "Subpart Q"
heading: "Roles and Responsibilities of Service Agents"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/49/subtA-part40-subpartQ"
sections_count: 8
---

# Subpart Q — Roles and Responsibilities of Service Agents

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

- [§40.341. Must service agents comply with DOT drug and alcohol testing requirements?](/cfr/49/40.341.md)
- [§40.343. What tasks may a service agent perform for an employer?](/cfr/49/40.343.md)
- [§40.345. In what circumstances may a C/TPA act as an intermediary in the transmission of drug and alcohol testing information to employers?](/cfr/49/40.345.md)
- [§40.347. What functions may C/TPAs perform with respect to administering testing?](/cfr/49/40.347.md)
- [§40.349. What records may a service agent receive and maintain?](/cfr/49/40.349.md)
- [§40.351. What confidentiality requirements apply to service agents?](/cfr/49/40.351.md)
- [§40.353. What principles govern the interaction between MROs and other service agents?](/cfr/49/40.353.md)
- [§40.355. What limitations apply to the activities of service agents?](/cfr/49/40.355.md)