# Caspian Sea legal, environmental, and strategic developments

> Live situation record from CLSTR: https://clstr.news/situations/caspian-sea-legal-and-diplomatic-cooperation
> Updated: 2026-09-08T14:11:06.000Z. Sources: 14. Developments: 6.

The legal status of the Caspian Sea remains a central focus of regional diplomacy. Iranian Foreign Ministry spokesperson Ismail Baghaei recently stated that the government considers it an appropriate time to submit the 2018 Convention on the Legal Status of the Caspian Sea to the Iranian parliament for ratification. While four other littoral states have ratified the treaty, Iran’s participation remains pending. Baghaei noted that because the Convention does not define a baseline, specific resource shares must be determined through bilateral negotiations.

Former Iranian Ambassador Mohsen Pakayin emphasized that the sea plays a “decisive role” in shaping relations among the five littoral nations, particularly for countries like Turkmenistan, Kazakhstan, and Azerbaijan that lack access to international waters. Pakayin noted that the 2018 convention facilitates cooperation across political, military, and environmental sectors, specifically highlighting its prohibition of military involvement by non-littoral countries to enhance regional stability.

Diplomatic activity is increasing, with Iran preparing to host a high-level conference in Tehran on September 23. In a recent briefing to the Iranian Parliament, Foreign Minister Seyyed Abbas Araghchi also addressed the convention regarding the legal status of the Caspian Sea. These efforts serve as precursors to a scheduled summit of Caspian Heads of State on October 9, 2026, in the Avaza National Tourist Zone.

Beyond legal cooperation, the sea serves as a strategic maritime corridor. Reports indicate that Russia and Iran are utilizing the sea to transport goods and military supplies, providing a route shielded from Western naval fleets and international sanctions.

## Timeline

### 2026-09-08: Iran expands transport networks and manages maritime security risks

Iran is advancing multimodal transport links through Armenia to the Black Sea, while regional tensions drive supertanker charter rates toward $500,000 and diplomatic talks continue over Caspian Sea status.

3 sources. https://clstr.news/cluster/iran-expands-transport-networks-and-manages-maritime-security-risks

### 2026-08-20: Caspian Sea becomes strategic supply corridor for Russia and Iran

Russia and Iran are leveraging the landlocked Caspian Sea as a strategic supply corridor to transport military and commercial goods, bypassing Western naval presence and international sanctions.

2 sources. https://clstr.news/cluster/caspian-sea-becomes-strategic-supply-corridor-for-russia-and-iran

### 2026-08-16: Caspian Sea plays decisive role in regional relations

Former Iranian Ambassador Mohsen Pakayin emphasizes the Caspian Sea's strategic role in regional cooperation and security under the 2018 legal status convention.

2 sources. https://clstr.news/cluster/caspian-sea-plays-decisive-role-in-regional-relations

### 2026-08-12: Caspian Sea environmental protection discussed at regional forums

Regional leaders and international organizations held conferences in Turkmenistan and Iran to discuss Caspian Sea environmental protection and coordinate sustainable development efforts.

4 sources. https://clstr.news/cluster/caspian-sea-ecosystem-protection-discussed-at-regional-forums

### 2026-08-10: Iran to host Caspian Sea conference in Tehran

Iran plans to host a high-level Caspian Sea conference in Tehran on September 23 and is considering submitting the Caspian Sea legal status convention to its parliament for ratification.

2 sources. https://clstr.news/cluster/iran-to-host-caspian-sea-conference-in-tehran

### 2026-08-06: Iran and Caspian Sea Legal Convention Strengthens Regional Security

Iran is set to ratify the 2018 Caspian Sea Convention, which creates a legal regime, bans non‑littoral military presence and aims to boost security and economic cooperation among the five bordering states.

2 sources. https://clstr.news/cluster/iran-and-caspian-sea-legal-convention-strengthens-regional-security

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Cite as: Caspian Sea legal, environmental, and strategic developments. CLSTR, https://clstr.news/situations/caspian-sea-legal-and-diplomatic-cooperation