It follows from recital 87 of this Judgment that, in a situation such as that concerning the negotiation of the European Agreement on Road Transport (AETR), ‘it was for the two institutions whose powers were directly concerned, namely, the Council and the Commission, to reach agreement, in accordance with Article 15 of the Treaty of 8 April 1965 establishing a Single Council and a Single Commission of the European Communities, on the appropriate methods of cooperation with a view to ensuring most effectively the defence of the interests of the Community.’