Foreigners at the Gate: Tehran Rushes the Caspian Treaty Through Parliament, Days Before Its Own Summit

Iran’s most senior legal diplomat has given the clearest official explanation yet of why Tehran, after eight years of deliberate delay, suddenly wants parliament to ratify the Convention on the Legal Status of the Caspian Sea. The reason, in his account, is that the world’s largest landlocked body of water is no longer closed.

In an interview with the state news agency IRNA, republished by the Tehran news site Entekhab, Kazem Gharibabadi, Deputy Foreign Minister for Legal and International Affairs, said the security environment around the Caspian over the past year or two bears no comparison to what came before — and that, as a result of decisions taken by some littoral states, “foreigners are gaining a foothold in the Caspian region.”

He did not name the states. He did not have to.

The Bill, and the Clock

The sequence has been unusually fast by Iranian standards. President Masoud Pezeshkian’s cabinet approved the ratification bill on 22 July under an expedited procedure and sent it to the Islamic Consultative Assembly with single-urgency status. Foreign Ministry spokesman Esmaeil Baghaei confirmed the transmission at a Tehran press briefing on 3 August, framing ratification as a way to prevent misuse of the sea “by players outside the Caspian.” Parliament’s National Security and Foreign Policy Commission began its review this week.

The deadline is not procedural but diplomatic. Iran hosts the next summit of Caspian heads of state in Tehran on 12 August — International Caspian Sea Day, and the twentieth anniversary of the entry into force of the 2003 Tehran Convention on the marine environment. Russian Foreign Minister Sergei Lavrov had publicly urged Tehran to complete ratification before that date. Iran is the only one of the five signatories that has not done so, and under the treaty’s own terms the document enters into force only when the fifth instrument of ratification is deposited. Tehran, in other words, holds the activation key to a regime it has spent eight years refusing to switch on.

What Gharibabadi Argued

Gharibabadi set out three considerations behind the government’s decision: the changed security picture, the need to deepen economic and commercial cooperation among the five coastal states, and the settlement of outstanding legal questions surrounding the sea.

On security, he pointed to Article 3 of the 2018 Aktau Convention, which prohibits the presence in the Caspian of armed forces belonging to non-party states — a ban he stressed extends to transit, not merely to basing. A companion principle commits each littoral state not to make its territory available to third countries for aggression or military action against any other party. A separate five-party agreement on military confidence-building measures, he said, is still under negotiation.

On the question that has poisoned the file inside Iran for a generation — the country’s share of the sea — Gharibabadi’s argument was one of separation. The convention, he maintained, does not fix percentages. The determination of straight baselines and the delimitation of the seabed and subsoil were deliberately detached from the treaty text and referred to separate agreements among the states concerned. Ratification therefore cannot cost Iran its resources, because the instrument never allocated them in the first place; Iran’s sovereignty, sovereign rights and jurisdiction over Caspian resources within its own maritime area remain, in his formulation, undiminished. He added that the government is willing to sit down with critics and believes it has clear answers to each of their objections.

Why the Argument is not Landing?

It is not landing because the Caspian stopped being a sanctuary this year.

Since the United States and Israel opened their campaign against Iran on 28 February, Tehran’s northern flank has been hit repeatedly. Israeli strikes in late March reportedly disabled a substantial part of Iran’s Caspian flotilla, including missile boats, a corvette, a shipyard and a command facility — degrading the maritime logistics line that runs from Russian ports to Bandar Anzali. Then, on 25 July, Ukrainian long-range drones struck inside the Caspian itself. Kyiv’s SBU said it hit the Russian missile boat Molniya and two sanctioned cargo vessels; President Volodymyr Zelensky said Ukraine had achieved strong results against “vessels used in military cargo shipments involving Iran.” Tehran said one of its commercial ships was struck, killing a sailor. Foreign Minister Abbas Araghchi said the attack “cannot go unanswered,” and Ukraine’s chargé d’affaires was summoned.

A treaty banning the navies of non-littoral states does nothing about a drone launched from a thousand kilometres away. That gap is the unspoken weakness in the government’s security case, and Iranian critics have found it.

The Domestic Revolt

The objection inside Iran is not to the convention’s security clauses but to the order of operations. Opponents argue that ratifying the framework before the seabed is divided surrenders leverage precisely where the money is.

Iran has insisted for three decades on an equal 20 percent share. The modified median-line method favoured by Russia, Kazakhstan and Azerbaijan would, because of Iran’s smooth concave coastline, yield roughly 11–13 percent. The treaty’s concession — a clause recognising that a manifestly unfavourable coastal configuration must be taken into account when drawing straight baselines — is a principle, not a number.

Shoaib Bahman, an Eurasia specialist writing in the IRGC-linked daily Javan, argued that ratifying before delimitation would “reduce Iran’s legal leverage in future negotiations” and undermine the 20 percent claim. His colleague Dariush Safarnejad urged deputies to return the bill to the government, noting that supplementary agreements meant to be concluded within six months of the 2018 signing have never been finalised. A Tehran University geopolitics professor, Kiumars Yazdanpanah, warned that the bill weakens rather than resolves Iran’s legal and security position and called for the file to be handed to non-political experts.

A second front concerns Article 14, under which a trans-Caspian pipeline requires the consent only of the states whose sectors it crosses — not all five. Iranian analysts read that as removing the last legal obstacle to a Turkmen or Kazakh line running west to Azerbaijan, strengthening Baku, reinforcing the Zangezur route and the wider “Turkic world” architecture, and eroding Iran’s position as a transit state. From exile, Reza Pahlavi added his own attack, calling ratification without guarantees of Iran’s historic rights a serious threat to the national interest.

The Larger Board

Strip away the polemics and the strategic picture is coherent. The closure of Hormuz turned the Trans-Caspian Middle Corridor from an aspiration into a necessity almost overnight. Kazakhstan and Azerbaijan are expanding ports, ferries and fleets; Ankara has positioned itself as the corridor’s institutional patron; European money is flowing toward a route designed to bypass both Russia and Iran. Tehran watches three of its four Caspian neighbours integrate westward while its own maritime capacity is being destroyed from the air.

Read against that background, Gharibabadi’s warning is less a legal argument than an admission. Iran is reaching for the one instrument that written law still offers it — a clause that keeps foreign navies out of a sea they cannot physically enter anyway — at the moment when the threats it actually faces have stopped arriving by ship.

Whether the Majlis accepts that trade before 12 August is now the only question that matters.