The 1982 United Nations Convention on the Law of the Sea (LOSC) came into force in 1994. Under its provisions coastal states have the right to delineate the outer limits of the juridical continental shelf beyond 200 nautical miles. This article outlines how to provide evidence and obtain the official recommendation by the Commission on the Limits of the Continental Shelf. Examples of difficulties that may occur under particular circumstances due to complex terminology of the related LOSC provisions are described. Possible implications for the Arctic Ocean are presented.