The easement is created by a reasoned decision of the competent administrative authority on a proposal from the deliberative body of the commune, group of communes, département or mixed syndicate concerned, following a survey of the land carried out in the same way as for expropriation. In the event of opposition from the municipal council of an interested municipality, the easement is created by decree of the Conseil d’Etat. The easement file is made available to the public for one month at the town hall of the municipality concerned.