46 CFR § 7.1 - General purpose of boundary lines.

---
identifier: "/us/cfr/t46/s7.1"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 7.1 - General purpose of boundary lines."
title_number: 46
title_name: "Shipping"
section_number: "7.1"
section_name: "General purpose of boundary lines."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "A"
subchapter_name: "PROCEDURES APPLICABLE TO THE PUBLIC"
part_number: "7"
part_name: "BOUNDARY LINES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "14 U.S.C. 503; 33 U.S.C. 151; DHS Delegation 00170.1, Revision No. 01.4."
regulatory_source: "CGD 81-058, 50 FR 25230, June 18, 1985, unless otherwise noted."
cfr_part: "7"
---


# 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 relating to the length of towing hawsers; 33 U.S.C. 1201 *et seq.,* the Vessel Bridge-to-Bridge Radiotelephone Act; 46 U.S.C. 5102(b)(6), which exempt from load line requirements certain vessels on domestic voyages; 46 U.S.C. 3301(6) requiring the inspection of seagoing barges which are defined in 46 U.S.C. 2101; 46 U.S.C. 3301(7) requiring the inspection of seagoing motor vessels which are defined in 46 U.S.C. 2101; 46 U.S.C. 3302(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, “Implementing the Officers' Competency Certificates Convention, 1936.”

[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]