(3)As regards the communication infrastructure for the Schengen environment, the Deputy Secretary-General of the Council was authorised by Decision 1999/870/ECnote and Decision 2007/149/ECnote to act, in the context of the integration of the Schengen acquis within the European Union, as the representative of certain Member States for the purposes of concluding and managing contracts relating to the installation and the functioning of the communication infrastructure for the Schengen environment, ‘SISNET’ pending its migration to a communication infrastructure under the responsibility of the European Union.