A collection of essays to mark the fortieth anniversary of the 1982 UNCLOS. To commemorate forty years since the 1982 UN Convention on the Law of the Sea (UNCLOS) and in honor of one of the main architects of UNCLOS, Singapore's Ambassador Tommy Koh, UNCLOS at 40 brings together law of the sea judges, scholars, and practitioners to explore a wide range of issues. It explains the reasons for the continuing endurance of UNCLOS as the foundation for the governance of the oceans and looks ahead to new challenges.