The Context
On April 12, 2026, President Trump announced a U.S. Naval Blockade targeting Iran, following failed ceasefire talks. The Department of Defense invoked the “belligerent right to visit and search” to interdict sanctioned vessels. Since then, 28 Iranian vessels have been forced to turn back, and multiple tankers have been seized in the Indian Ocean and Arabian Sea. CENTCOM has also cleared Iranian-laid mines to resume neutral commercial traffic. This is a significant escalation in maritime interdiction operations, with no formal U.S. legislation or international law citations publicly available to authorise these actions.
The Risk
For directors of any entity with vessels or cargo transiting these waters, the risk is twofold. First, unintended military confrontation could result in loss of assets, crew liability, and legal claims against the company. Under the Health and Safety at Work Act 2015 (HSWA), directors may be personally liable if they fail to ensure the safety of workers—including crew—in such high-risk environments. Second, if your organisation is found to be in breach of sanctions or trade embargoes enforced by this blockade, you could face prosecution under the Companies Act 1993 for failing to exercise due diligence. The absence of clear legal authorisation does not shield you; it amplifies the risk of retrospective liability if courts later deem the blockade unlawful. The dollar value of seized cargoes and potential fines could cripple a balance sheet.
The Control
The only prudent control is immediate, documented due diligence. Directors must demand a legal audit of all maritime operations in the region, including charter parties, insurance policies, and sanctions compliance frameworks. This is not a time for passive reliance on standard procedures. You must proactively assess whether your organisation can legally and safely operate under a blockade with contested legal authority. Failure to act now may be seen as a breach of duty if escalation occurs.
The Challenge
These are the critical questions you should be raising at the board table:
| What legal opinion have we obtained on the validity of this blockade under international law, and what is our exposure if it is later deemed unlawful? | |
| Have we audited all current voyages and charters in the Indian Ocean and Arabian Sea for sanctions compliance, and do we have a clear escalation plan if our vessels are interdicted? | |
| What is our duty of care to crew in a conflict zone, and how have we documented our risk assessments and mitigation measures under HSWA? |