In 1973, Canada and Denmark negotiated the geographic coordinates of the continental shelf, and settled on a delimitation treaty that was ratified by the United Nations on December 17, 1973, and has been in force since March 13, 1974. The treaty lists 127 points (by latitude and longitude) from Davis Strait to the end of Robeson Channel, where Nares Strait runs into Lincoln Sea; the border is defined by geodesic lines between these points. The treaty does not, however, draw a line from point 122 () to point 123 ()—a distance of . Hans Island is situated in the centre of this area.