Andorra–France border

The Andorra–France border extends for 57 km along the south edge of France (departments of Ariège and Pyrenees-Orientales) and along the north and northeast edge of Andorra.This is the third smallest land border of France, after the border with Monaco and the border with the Netherlands (on the island of Saint Martin).SpecificationsIt starts in the west at the western Andorra - Spain - France tripoint, located at the peak of Médécourbe (42°36'13"N 1°26'33" E). It then follows a general direction north-east and then southeast to eastern Andorra - Spain - France tripoint 42°30'09"N 1°43'33" E).The Franco-Andorran border is essentially customary, which means that no international treaty specifically fixed in the plot (there is no boundary), except for the cases below.In 2001, a bilateral treaty between France and Andorra dealt with the rectification of the border. It stipulates the exchange of two equal areas of land plots of 15,925 m² each. The operation should enable Andorra to construct on the assigned plot, the viaduct that will link the Envalira tunnel to the RN 22.The French town of Porta, in the Pyrénées-Orientales, challenged before the Judicial Division of the State Council as contrary to the treaty the Constitution: it complained, in fact, not to have been consulted before the drafting and approval of the treaty. The State Council has dismissed its application, arguing that the treaty had been ratified by law and that therefore it was not for it to rule on the legality of the law. Moreover, nothing obliges the state to consult with neighboring municipalities about a border when adding a modification thereof.