---
kind: "section"
citation: "46 C.F.R. § 7.1"
title: "46"
number: "7.1"
heading: "General purpose of boundary lines."
url: "https://uscodex.org/cfr/46/7.1"
---

# §7.1. General purpose of boundary lines.


The lines in this part delineate the application of the following U.S. statutes: [33 U.S.C. 152](/usc/33/152.md) relating to the length of towing hawsers; [33 U.S.C. 1201](/usc/33/1201.md) et seq., the Vessel Bridge-to-Bridge Radiotelephone Act; [46 U.S.C. 5102(b)(6)](/usc/46/5102.md?p=b-6), which exempt from load line requirements certain vessels on domestic voyages; [46 U.S.C. 3301(6)](/usc/46/3301.md?p=6) requiring the inspection of seagoing barges which are defined in [46 U.S.C. 2101](/usc/46/2101.md); [46 U.S.C. 3301(7)](/usc/46/3301.md?p=7) requiring the inspection of seagoing motor vessels which are defined in [46 U.S.C. 2101](/usc/46/2101.md); [46 U.S.C. 3302(d)](/usc/46/3302.md?p=d) which exempts from inspection requirements certain vessels under 150 gross tons that operate within the waters of southeastern Alaska and the State of Washington; and [46 U.S.C. 8304](/usc/46/8304.md), “Implementing the Officers' Competency Certificates Convention, 1936.”


## Notes

### Amendments

[CGD 81-058, 50 FR 25230, June 18, 1985, as amended by CGD 95-028, 62 FR 51195, Sept. 30, 1997; USCG-1998-4442, 63 FR 52188, Sept. 30, 1998; USCG-2024-1103, 90 FR 52879, Nov. 24, 2025]

### Authority

Authority: 14 U.S.C. 503; 33 U.S.C. 151; DHS Delegation 00170.1, Revision No. 01.4.

### Source

Source: CGD 81-058, 50 FR 25230, June 18, 1985, unless otherwise noted.

### Amendments

[CGD 81-058, 50 FR 25230, June 18, 1985, as amended by CGD 95-028, 62 FR 51195, Sept. 30, 1997; USCG-1998-4442, 63 FR 52188, Sept. 30, 1998; USCG-2024-1103, 90 FR 52879, Nov. 24, 2025]