 In 1972, the British Island of Rockall Act formally annexed Rockall to the United Kingdom.The UK considers the rock administratively part of the Isle of Harris and, under the Scottish Adjacent Waters Boundaries Order 1999 a large sea area around it was declared to be under the jurisdiction of Scots law.A navigational beacon was installed on the island in 1982 and the UK declared that no ship would be allowed within a radius of the rock.