1. In order to achieve the objectives referred to in Article 170, the Union:
— shall establish a series of guidelines covering the objectives, priorities and broad lines of measures envisaged in the sphere of trans-European networks; these guidelines shall identify projects of common interest,
The Union's activities shall take into account the potential economic viability of the projects.
2. Member States shall, in liaison with the Commission, coordinate among themselves the policies pursued at national level which may have a significant impact on the achievement of the objectives referred to in Article 170. The Commission may, in close cooperation with the Member State, take any useful initiative to promote such coordination.
3. The Union may decide to cooperate with third countries to promote projects of mutual interest and to ensure the interoperability of networks.