The Centre for International Land and Maritime Boundaries (CILMB) is a centre of expertise based in London that provides trusted advisory, representation, training, and research on all issues of international boundary making, challenges, and dispute resolution.

We provide a distinctly multidisciplinary approach to sovereignty and international boundaries to states and private entities on legal challenges related to disputed land territory, or maritime areas, as well as technical aspects.

The determinations of outstanding land and maritime frontiers, their demarcation on the field once determined, as well as their day-to-day management are strategic issues of vital importance to any State. What is less known, however, is that these issues also involve a wide range of sensible public international law rules and principles. Technical aspects including geographical, economic, demographic, security-related and other constraints require in-depth assessment. Furthermore, issues related to the sovereignty over natural and human resources extending over or under frontiers, as well as disputes over management of transboundary watercourses, have in recent decades become omnipresent.

CILMB gathers some of the most recognised specialists in legal, political and technical aspects of boundary-making and management. Experts of CILMB have advised sovereigns and other public and private entities on boundary-related issues in dozens of countries around the world. Our experts have appeared before the International Court of Justice, the Permanent Court of Arbitration, the International Tribunal for the Law of the Sea and ad hoc arbitral tribunals in a number of land and maritime boundary disputes.

In addition, our experts have been instructed to advise on negotiations of land and maritime boundary agreements, on processes of delimitation of continental shelf, on agreements regarding joint exploitation or development of maritime zones.