In 1913, a bilateral exchange of notes [1] between Germany and France was signed in the first agreement to provide airship services. This requirement must not discriminate between carriers operating on the same route, take into account the aircraft`s capacity and be exercised in such a way as not to interfere with the normal operation of the relevant international air services or the rights and obligations of a contracting state. This agreement remains in force as long as the above agreement is in force; However, provided that any State Contracting Party to the Agreement can denounce it on a one-year note addressed to the Government of the United States of America, which promptly informs all other States Parties of this communication and its withdrawal. Subject to the provisions of the previous section, any State party may enter into agreements on international air services that are not incompatible with this agreement. Such an agreement is registered without delay by the Council, which publishes it as soon as possible. The privileges of this section do not apply to airports used for military purposes, excluding international scheduled air services. In areas of active hostility or military occupation and, in times of war, along the supply routes leading to these areas, the exercise of these privileges is subject to the approval of the competent military authorities. Where a dispute between two or more States parties concerning the interpretation or application of this agreement cannot be resolved through negotiations, the provisions of Chapter XVIII of that convention apply in the same way as they are, in reference to any difference of opinion regarding the interpretation or application of the aforementioned convention. Each State party grants the following exemptions to other States Parties with respect to international scheduled air services: the bilateral system is based on the Chicago Convention and related multilateral treaties.