Article 70 Chicago Convention
Financing of air navigation facilities
A contracting State, in the circumstances arising under the provisions of Article 69, may conclude an arrangement with the Council for giving effect to such recommendations. The State may elect to bear all of the costs involved in any such arrangement. If the States does not so elect, the Council may agree, at the request of the State, to provide for all or a portion of the costs.
See also: Article 69 Chicago Convention