Title 46 › Subtitle Subtitle I— General › Chapter 5— OTHER GENERAL PROVISIONS › § 501
The Secretary of Defense can ask a federal agency to temporarily ignore navigation and vessel‑inspection rules when needed to fix an immediate problem that hurts military operations. After that request, the Secretary must send a written explanation within 24 hours to the House committees on Transportation and Infrastructure and Armed Services and the Senate committees on Commerce, Science, and Transportation and Armed Services, and confirm there are not enough qualified ships to meet defense needs. If the President finds a waiver is needed for national defense, an agency head may grant a ship‑specific waiver only after the Maritime Administrator (acting as Director of the National Shipping Authority) says U.S.-flag ships are not available, and not before 48 hours after the waiver request is posted online. Each waiver can last up to 10 days and can be extended once for another 10 days if the Maritime Administrator confirms non‑availability; all waivers for the same event together may not go past 45 days. The Maritime Administrator must identify possible steps to use U.S. ships first, notify the Secretary of Transportation and the agency head, and post the determination on the Department of Transportation website within 48 hours. The agency head must tell the four congressional committees about any waiver request and any issued waiver within 48 hours and explain why it is needed and why the other steps won’t work. No waiver may be given for a ship that, when the request is made, is carrying goods that could be unloaded at coastwise points under the waiver. The agency must post every waiver request on its website and post an explanation within 48 hours if it denies a request. After a voyage under a waiver, the ship owner or operator and the person who asked for the waiver must give the Maritime Administrator a report within 10 days with the vessel name and flag, owner and operator, voyage dates, ports, cargo, why the waiver was needed for defense, and any other required details; the Administrator must post that report within 48 hours. The authority to waive these rules ends when Congress by concurrent resolution or the President sets a time.
Full Legal Text
Shipping — Source: USLM XML via OLRC
Legislative History
Reference
Citation
46 U.S.C. § 501
Title 46 — Shipping
Last Updated
Apr 5, 2026
Release point: 119-73not60