UK-Norwegian boundary treaty

Britain accepted that measurements would be made from the outermost rocks along the Norwegian coast while the UK, which does not have small islands and skerries, had to measure from the shoreline at low water. This treaty proved crucial for Frigg, which turned out to straddle the boundary as it had been defined.

Article 4 of the treaty specified that, should a petroleum structure extend across the median line, the parties would seek to reach agreement on how it could be exploited most efficiently. A legal framework for oil production was also established. A similar treaty was concluded between Norway and Denmark on 8 December 1965.