---
kind: "unit"
title: "49"
title_heading: "Transportation"
key: "subtB/chIII/subchB/part399"
level: "part"
label: "Part 399"
heading: "Employee Safety and Health Standards"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/49/subtB-chIII-subchB-part399"
sections_count: 6
---

# Part 399 — Employee Safety and Health Standards

Title 49 C.F.R. — Transportation › Subtitle B — Other Regulations Relating to Transportation › Chapter III — Federal Motor Carrier Safety Administration, Department of Transportation › Subchapter B — Federal Motor Carrier Safety Regulations

## Contents

- [Subpart A-K — Subparts A-K [Reserved]](/cfr/49/subtB-chIII-subchB-part399-subpartA-K.md)
- [Subpart L — Step, Handhold, and Deck Requirements for Commercial Motor Vehicles](/cfr/49/subtB-chIII-subchB-part399-subpartL.md)