Index/Organizations/United Nations Convention on the Law of the Sea

United Nations Convention on the Law of the Sea

International maritime law

Fact-Checks

20 results
Dec 10, 2025
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What constitutes a stateless vessel under UNCLOS and customary international law?

UNCLOS does not give a single statutory definition of “stateless” vessels but treats ships “without nationality” as those not entitled to fly a State’s flag or assimilated to that condition when flyin...

Dec 7, 2025
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What legal authority allows the US to destroy vessels suspected of trafficking drugs?

The United States relies primarily on maritime law-enforcement statutes (notably the Maritime Drug Law Enforcement Act and related statutes such as the Drug Trafficking Vessel Interdiction Act) and bi...

Dec 18, 2025
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How does international law treat naval blockades and ship seizures in peacetime, and have similar measures been lawfully used by the U.S. before?

International law treats a naval blockade as an act of war governed by longstanding treaties and custom: it must be declared, effectively enforced and applied impartially, and in peacetime a blockade ...

Dec 11, 2025

Can international maritime law lead to asset forfeiture after a tanker seizure?

International maritime law does not on its own create a general power to forfeit a seized tanker; rather, nation-states rely on domestic statutes, admiralty procedure and special arrangements to conve...

Dec 13, 2025

What rules does the United Nations Convention on the Law of the Sea (UNCLOS) set for seizing ships on the high seas?

UNCLOS makes the flag state the primary authority over ships on the high seas and permits other states only narrow, named exceptions for boarding and seizure—chiefly piracy, slave trade, unauthorized ...

Dec 16, 2025

Under what international laws could US strikes on Venezuelan ships be justified or illegal?

U.S. strikes on vessels linked to Venezuela have been defended as lawful counter-narcotics and self‑defense actions by the White House and Pentagon, but multiple legal authorities — UN experts, academ...

Dec 19, 2025

What are documented cases of U.S. interdictions of suspected drug vessels since 1986 and the legal basis used in each?

Since 1986 the United States has built a legal architecture for high‑seas drug interdiction centered on the Maritime Drug Law Enforcement Act (MDLEA) and related statutes, supplemented by internationa...

Dec 14, 2025

What UN conventions regulate interdiction and use of force against suspected smuggling vessels?

The principal UN instruments that frame interdiction and the use of force against suspected smuggling vessels are the 2000 United Nations Convention against Transnational Organized Crime (UNTOC) and i...

Dec 13, 2025

Can coastal states interdict stateless vessels in their exclusive economic zones under UNCLOS?

UNCLOS explicitly allows boarding and other enforcement against stateless vessels on the high seas, while coastal-state enforcement powers inside the Exclusive Economic Zone (EEZ) are more limited and...

Dec 12, 2025

How does state practice and opinio juris shape customary law on stateless ships?

State practice on stateless ships is uneven: some states and commentators treat unflagged vessels as lawful targets for boarding and even seizure, while other authorities stress that UNCLOS and custom...

Dec 12, 2025

How does the UN Charter authorize use of force for maritime interdiction after 2020?

After 2020, the UN Charter still authorizes use of force at sea primarily under Security Council Chapter VII measures (Articles 41–42) and the inherent right of self‑defence under Article 51; States a...

Dec 3, 2025

How has the International Tribunal for the Law of the Sea ruled on innocent passage and interdiction?

The International Tribunal for the Law of the Sea (ITLOS) has repeatedly affirmed that coastal States must allow innocent passage of foreign ships but may act against passages that are not “innocent,”...

Jan 9, 2026

How have past court rulings handled disputes over seized oil vessels and cargo?

U.S. courts have treated seizures of oil tankers and their cargo as civil admiralty in rem actions that require a warrant, proof of maritime nexus and location, and a forfeiture process open to owner ...

Jan 6, 2026

What legal standards define a stateless vessel and when may any State seize it on the high seas?

International law treats a vessel that lacks a genuine national registration as "without nationality" or stateless, permitting other States a limited right to board and inspect on the high seas; that ...

Dec 18, 2025

What international tribunal rulings define when a vessel is 'stateless' under UNCLOS?

There is no single international tribunal ruling that cleanly and exhaustively defines when a vessel is “stateless” under UNCLOS; instead, tribunals and arbitral bodies have left significant space for...

Dec 11, 2025

How have recent cases or international tribunals interpreted lawful seizure of vessels since 2020?

Since 2020 national courts and states have justified vessel seizures by invoking domestic statutes (forfeiture, sanctions, and drug laws) and narrow exceptions in the law of the sea; tribunals such as...

Dec 11, 2025

How do flag state and port state jurisdictions affect legal proceedings after a tanker seizure?

Flag states normally hold primary jurisdiction over a vessel on the high seas and bear duties under UNCLOS and IMO instruments to police registry, safety and pollution compliance (see duties under Art...

Nov 25, 2025

What international conventions (UNCLOS, SUA) apply to prosecuting attacks on ships and how are they implemented?

UNCLOS sets the baseline definitions and jurisdictional rules for piracy and the limits of states’ powers at sea, while the 1988 SUA Convention (and its 2005 Protocol) criminalize a broader set of unl...

Nov 3, 2025

How does the United Nations Convention on the Law of the Sea (UNCLOS) address enforcement against stateless or flagged ships for drug crimes?

The core claim is that UNCLOS authorizes boarding and inspection of on the high seas and provides a basis for enforcement against drug trafficking, while national laws like the U.S. Maritime Drug Law ...

Oct 25, 2025

Can foreign naval vessels use force against suspected drug boats in the territorial waters of another country?

Foreign warships generally may not lawfully use force against suspected drug-smuggling boats inside another state's territorial waters except with that state's consent or under narrow exceptions; inte...