Faroe Islands and the European Union Schengen Area are not subject to border controls, although there may be identity checks when checking in for flights. Charges for international services such as phone roaming and bank transfers are much higher than inside the EU. In July 2013 EU imposed sanctions on the Faroe Islands due to a dispute over the fishing quota of herring and mackerel. The boycott which started on 28 August 2013 banned Faroese vessels carrying herring or mackerel from all EU ports, including Denmark, Sweden and Finland. The Faroe Islands could no longer export herring or mackerel to EU countries. The boycott was lifted
Individual fishing quota the zero-sum game imperative of catching as many fish as possible, knowing that any fish they did not catch would likely be taken by another boat. Commercial fishing evolved from subsistence fishing with no restrictions that would limit or direct the catch. The implicit assumption was that the ocean's bounty was so vast that restrictions were unnecessary. In the 20th century, fisheries such as Atlantic cod and California sardines collapsed, and nations began to limit access to their fishing grounds by boats from other countries, while in parallel, international organizations began to certify that specific species were "threatened", "endangered", etc.