49 CFR § 673.21 - General requirements.

---
identifier: "/us/cfr/t49/s673.21"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "49 CFR § 673.21 - General requirements."
title_number: 49
title_name: "Transportation"
section_number: "673.21"
section_name: "General requirements."
chapter_name: "FEDERAL TRANSIT ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
part_number: "673"
part_name: "PUBLIC TRANSPORTATION AGENCY SAFETY PLANS"
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. 5329, 5334; 49 CFR 1.91."
regulatory_source: "89 FR 25738, Apr. 11, 2024, unless otherwise noted."
cfr_part: "673"
---


# 673.21 General requirements.

Each transit agency must establish and implement a Safety Management System under this part. A transit agency Safety Management System must be appropriately scaled to the size, scope and complexity of the transit agency and include the following elements:

(a) Safety Management Policy as described in § 673.23;

(b) Safety Risk Management as described in § 673.25;

(c) Safety Assurance as described in § 673.27; and

(d) Safety Promotion as described in § 673.29.