The delimitation of maritime boundaries is a complex and multifaceted process with legal and technical aspects. The process involves the determination of a maritime boundary in a situation where two or more states are confronted with overlapping titles. In the absence of any precise rules in treaty law and established customary rules based on state practice, it has been left to the jurisprudence of international courts and tribunals to develop the applicable law of maritime boundary delimitation. This article provides a detailed examination of the complex and multifaceted processes involved in maritime delimitation law. In doing so, it highlights recent developments in the field, with an emphasis on the emerging principles of “non-cut-off” and “non-distortion.” The article also analyzes the crystalizing rules on delimitation beyond 200 nautical miles and questions the applicability of these rules to the ongoing maritime boundary dispute between Canada and the United States in the Beaufort Sea.

On July 7, 2014, an ad hoc arbitral tribunal (Tribunal) rendered its award on the dispute between Bangladesh and India concerning the delimitation of their entire maritime boundary in the northern part of the Bay of Bengal. The award established the course of the boundary line in the territorial sea, the exclusive economic zone (EEZ), and the continental shelf within and beyond 200 nautical miles, ending a dispute that had persisted between the neighbors for more than three decades.

On November 19, 2012, the International Court of Justice rendered its judgment in a dispute involving territorial and maritime claims raised by Nicaragua against Colombia in the Caribbean Sea. The Court considered Nicaragua’s requests for a declaration of Nicaraguan sovereignty over seven disputed maritime features and delimitation of a single maritime boundary between the continental shelves and exclusive economic zones appertaining to Nicaragua and Colombia. The Court awarded all disputed territory to Colombia and delimited the maritime boundary between the states’ continental shelves and exclusive economic zones by using a novel mix of weighted base points, geodetic lines, parallels of latitude, and enclaving.