49 CFR § 399.203 - Applicability.

---
identifier: "/us/cfr/t49/s399.203"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "49 CFR § 399.203 - Applicability."
title_number: 49
title_name: "Transportation"
section_number: "399.203"
section_name: "Applicability."
chapter_name: "FEDERAL MOTOR CARRIER SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "B"
subchapter_name: "FEDERAL MOTOR CARRIER SAFETY REGULATIONS"
part_number: "399"
part_name: "EMPLOYEE SAFETY AND HEALTH STANDARDS"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "49 U.S.C. 31502; and 49 CFR 1.87."
regulatory_source: "44 FR 43732, July 26, 1979, unless otherwise noted."
cfr_part: "399"
---


# 399.203 Applicability.

This subpart applies to all trucks and truck-tractors, having a high profile cab-over-engine (COE) configuration, for entrance, egress and back of cab access, manufactured on and after September 1, 1982.

[44 FR 43732, July 26, 1979, as amended at 46 FR 56799, Nov. 19, 1981]