An ordinance n°2016-1687 of 8 December 2016 relating to maritime areas under the sovereignty or jurisdiction of the French Republic was published in the Official Journal on 9 December 2016. This ordinance was adopted according to article 97-II of the law n°2016-816 of 20 June 2016 (Blue Economy), which authorised, under the conditions laid down in article 38 of the Constitution, the Government to take by means of an ordinance all measures within the area of law, in order to group, order and update the provisions relating to maritime areas. The ordinance aims mainly at introducing consistency in the status of the maritime areas. The ordinance includes a first title on the definition of the maritime areas under the sovereignty or jurisdiction of the French Republic. This concept is clarified and a definition of each of its components is given.