46 CFR § 139.100 - Purpose.

---
identifier: "/us/cfr/t46/s139.100"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 139.100 - Purpose."
title_number: 46
title_name: "Shipping"
section_number: "139.100"
section_name: "Purpose."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "M"
subchapter_name: "TOWING VESSELS"
part_number: "139"
part_name: "THIRD-PARTY ORGANIZATIONS"
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. 3103, 3301, 3306, 3308, 3316, 8104, 8904; 33 CFR 1.05; DHS Delegation 0170.1."
regulatory_source: "81 FR 40101, June 20, 2016, unless otherwise noted."
cfr_part: "139"
---


# 139.100 Purpose.

(a) This part states the requirements applicable to third-party organizations (TPOs) that conduct audits and surveys for towing vessels as required by this subchapter.

(b) The Commandant delegates to the Towing Vessel National Center of Expertise (TVNCOE) the authority to carry out the functions of this part associated with approval of TPOs, including revocation and suspension of approval.