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Maddahinasab Legal Advisory Presents

Interregnum Counsel

A Legal Intelligence Letter for Transitional Markets

Every period of geopolitical transition produces an abundance of headlines and a shortage of strategic clarity. Interregnum Counsel exists to close that gap — distinguishing structural legal change from temporary noise, before it becomes market consensus.

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About the Publication

Legal analysis built for the pace of transitional markets

Each issue follows the same disciplined sequence: establishing the relevant developments and the background needed to understand them, assessing the legal mechanics at play, drawing out the commercial and investment implications, and closing with a forward-looking scenario and MTRIS™ decision framework.

The first three issues are devoted to a single case — the renewed escalation between the United States and Iran — each applying the same underlying analysis through a different sector: Issue 1 took the energy lens; Issue 2 examined supply chains and transportation; Issue 3 turns to banking, aviation sanctions, and the naval blockade. A Quarterly Review consolidating all three into one holistic assessment is forthcoming.

Written by Mostapha Maddahinasab, Ph.D. Founder, Maddahinasab Legal Advisory · Architect of MTRIS™
Issue Archive

Published Issues

01 2026
Energy Markets

The Trends of Uncertainty: Energy Markets Under Renewed U.S.–Iran Tensions

Examines the legal and regulatory mechanics behind renewed U.S.–Iran tensions through an energy-sector lens — the Islamabad Memorandum, the rapid narrowing of OFAC General License X to X1, and comparative precedent from the JCPOA sanctions cycle of 2016–2018. Closes with a stakeholder decision matrix and MTRIS™ Intelligence Index rating institutional, transactional, and operational risk.

Download Issue No. 1 PDF — 7 pages
02 2026
Supply Chains & Transportation

Hormuz and Beyond: Supply-Chain Reconfiguration Under Dual Chokepoint Pressure

Examines supply-chain and logistics exposure under simultaneous disruption of both the Strait of Hormuz and Bab el-Mandeb — mapping maritime route fragmentation, insurance and freight risk repricing, and the structural divergence emerging between Persian Gulf, Red Sea, and alternative land-based corridors. Covers Oman–Iran maritime governance discussions, contractual force majeure and change-in-law exposure for logistics operators, and closes with a Predictive Watch List and MTRIS™ Intelligence Index assessment across all three analytical layers.

Download Issue No. 2 PDF — 8 pages
03 2026
Banking, Sanctions & Aviation

Grounded: Banking Sanctions, Aviation and Naval Blockade Under A Deal That Wasn’t

Examines the September 8 aviation sanctions package — Treasury’s designation of 36 targets including 27 Iranian airlines, the indefinite suspension of General License J-1, and the closure of the wind-down window on September 23 — alongside the mechanics of the U.S. naval blockade that has halted Iranian crude exports. Covers Iran’s retaliatory threat against sanctions-compliant regional airports, the one-vote Senate margin against ending military action, and the September 28–29 Qatari-mediated talks. Closes with a Predictive Watch List and MTRIS™ Intelligence Index assessment.

Download Issue No. 3 PDF — 6 pages

Issues are archived here following publication on Substack. The current series applies the MTRIS™ framework to the 2026 U.S.–Iran conflict across three sectors: energy, supply chains, and banking & aviation. A Quarterly Review consolidating all three is forthcoming.

Frequently Asked

About Interregnum Counsel

How often is Interregnum Counsel published?

Interregnum Counsel is published periodically as material developments warrant, rather than on a fixed calendar. The first three issues apply the same underlying legal analysis of U.S.–Iran tensions through three different sectors: energy (Issue 1), supply chains and transportation (Issue 2), and banking, aviation sanctions, and the naval blockade (Issue 3). A Quarterly Review consolidating all three is forthcoming.

Is Interregnum Counsel free to subscribe to?

Yes. Interregnum Counsel is delivered by email through Substack, free of charge. New issues arrive by subscription as soon as they are published, ahead of their archival on this page.

What is the difference between Interregnum Counsel and the Research page?

Interregnum Counsel is a periodic legal intelligence letter tracking specific, timely developments — such as a sanctions policy shift — as they happen. The Research & White Papers page hosts standalone, in-depth MTRIS™ market outlooks that are updated less frequently and cover a market's legal architecture more broadly.

Who writes Interregnum Counsel?

Interregnum Counsel is written by Mostapha Maddahinasab, Ph.D., Founder and Principal Advisor of Maddahinasab Legal Advisory and architect of the MTRIS™ framework applied throughout the publication.

Can I cite Interregnum Counsel in my own research or reporting?

Yes. Each issue carries a permanent reference code and a suggested citation format, and forecasts published in the Predictive Watch List retain a permanent reference code that is revisited and reassessed in later issues.

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