Acquiescence and mutual tolerance became the basis of the ICJ decision in the Anglo-Norwegian Fisheries case (UK v. Norway, 1951). The Court accepted the legality of Norway’s straight baseline system for delimiting its “Fishery Zone” by a 1935 decree. This decree was based on Norway’s earlier decrees of 1869 and 1889. No State had protested against them including the United Kingdom. The Court observed that there is a general tolerance with regard to the Norwegian practice.