---
kind: "unit"
title: "46"
title_heading: "Shipping"
key: "chI/subchB/part16"
level: "part"
label: "Part 16"
heading: "Chemical Testing"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/46/chI-subchB-part16"
sections_count: 17
---

# Part 16 — Chemical Testing

Title 46 C.F.R. — Shipping › Chapter I — Coast Guard, Department of Homeland Security › Subchapter B — Merchant Marine Officers and Seamen

## Contents

- [Subpart A — General](/cfr/46/chI-subchB-part16-subpartA.md)
- [Subpart B — Required Chemical Testing](/cfr/46/chI-subchB-part16-subpartB.md)
- [Subpart C — Subpart C [Reserved]](/cfr/46/chI-subchB-part16-subpartC.md)
- [Subpart D — Employee Assistance Programs](/cfr/46/chI-subchB-part16-subpartD.md)
- [Subpart E — Management Information System](/cfr/46/chI-subchB-part16-subpartE.md)