HAMBURG, Germany (CN) — Two Indian Ocean island nations faced off Monday before a United Nations maritime tribunal in a territory conflict with broad implications.
Mauritius argued before the International Tribunal for the Law of the Sea that it, not the Maldives, is the rightful owner of a disputed portion of ocean territory, including the waters around a group of islands claimed by the United Kingdom.
“We are neighboring countries, we share interests and common challenges,” Dheerendra Dabee, the agent for Mauritius, told the nine-judge U.N. panel in his opening statements.
By accepting jurisdiction in the case in 2021, the Hamburg, Germany-based court has already effectively ruled the U.K.’s continued possession of the Chagos Islands – a strategically important group of islands that has been partially leased to the United States military – is illegal.
Under the 1982 U.N. Convention on the Law of the Sea, countries with ocean borders have control of the waters extending 230 miles from their coast. Mauritius and the Maldives disagree on where the distance should be measured from.
“With the greatest respect to our friends from the Maldives, they are wrong,” lawyer Philippe Sands, arguing on behalf of Mauritius, told the full courtroom. He said that the Maldives’ proposed boundary takes 99% of the disputed area for itself.
In hearings about jurisdiction, the Maldives argued Mauritius had no grounds to bring the complaint because the area in question bordered a U.K. territory. But the court found that “the United Kingdom is not an indispensable party to the present proceedings,” in line with a 2019 advisory opinion from the International Court of Justice, or ICJ, that the continuing British occupation of the islands was illegal.
The U.K. took possession of Mauritius, which included the Chagos Islands, from France in 1810, using the islands primarily for plantations. A century and a half later, concerns about the expansion of the Soviet Union led the U.S. to look for a location for a military base in the region, ultimately convincing the U.K. to lease it one island, Diego Garcia.