Udal Law

Udal law is a Norse derived system of land tenure and property law surviving in Shetland and Orkney in Scotland and, in modified form, on the Isle of Man, taking its name from the Old Norse word for inherited property. It was codified under Norwegian kings including Magnus I and Magnus VI, and continued to apply in Shetland and Orkney even after the Treaty of Perth transferred the Hebrides and the Isle of Man to Scots law. It differs from Scots law in several respects, including extending coastal property rights to the lowest astronomical tide rather than the high water mark and treating swans as private rather than Crown property, and it still operates alongside Scots law in property cases today. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/