33 CFR § 174.1 - Applicability; preemptive effect.
---
identifier: "/us/cfr/t33/s174.1"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "33 CFR § 174.1 - Applicability; preemptive effect."
title_number: 33
title_name: "Navigation and Navigable Waters"
section_number: "174.1"
section_name: "Applicability; preemptive effect."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "S"
subchapter_name: "BOATING SAFETY"
part_number: "174"
part_name: "STATE NUMBERING AND CASUALTY REPORTING SYSTEMS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "46 U.S.C. 6101 and 12302; DHS Delegation No. 00170.1, Revision No. 01.4."
regulatory_source: "CGD 72-54R, 37 FR 21402, Oct. 7, 1972, unless otherwise noted."
cfr_part: "174"
---
# 174.1 Applicability; preemptive effect.
This part establishes a standard numbering system for vessels and a uniform vessel casualty reporting system for vessels by prescribing requirements applicable to the States for the approval of State numbering systems. The regulations in subparts A, B, and D of this part have preemptive effect over conflicting State or local regulation. The regulations in subpart C of this part have preemptive effect over State or local regulation within the same field, except to the extent that Congress requires the Coast Guard to allow State casualty reporting systems pursuant to 46 U.S.C. chapter 131.
[USCG-2003-14963, 77 FR 18701, Mar. 28, 2012]