---
kind: "section"
citation: "46 C.F.R. § 4.03-0"
title: "46"
number: "4.03-0"
heading: "Definitions that apply to this subpart."
url: "https://uscodex.org/cfr/46/4.03-0"
---

# §4.03-0. Definitions that apply to this subpart.


This subpart contains terms defined for purposes of this part. Other definitions used in this part are in [33 CFR 140.10](/cfr/33/140.10.md).


## Notes

### Amendments

[USCG-2013-1057, 91 FR 39485, June 30, 2026]

### Authority

Authority: 43 U.S.C. 1333; 46 U.S.C. 2103, 2303a, 2306, 6101, 6301, 6305, 56311, and 70034; Department of Homeland Security Delegation No. 00170.1, Revision No. 01.4. Subpart 4.40 issued under 49 U.S.C. 1903(a)(1)(E).

### Source

Source: CGD 74-119, 39 FR 33317, Sept. 17, 1974, unless otherwise noted.

### Amendments

[USCG-2013-1057, 91 FR 39485, June 30, 2026]