1. For the development of implementing rules pursuant to Article 3 which fall within the remit of Eurocontrol, the Commission shall issue mandates to Eurocontrol setting out the tasks to be performed and the timetable therefor. In this connection, it shall endeavour to make best use of the arrangements of Eurocontrol for the involvement and consultation of all interested parties, where these arrangements correspond to Commission practices on transparency and consultation procedures and do not conflict with its institutional obligations. The Commission shall act in accordance with the procedure referred to in Article 5(2).
2. On the basis of the work completed pursuant to paragraph 1, decisions regarding the application of the results of such work within the Community and the deadline for their implementation shall be taken in accordance with the procedure referred to in Article 5(3). These decisions shall be published in the Official Journal of the European Union.
3. Notwithstanding paragraph 2, if Eurocontrol cannot accept a mandate that was issued to it under paragraph 1, or if the Commission, in consultation with the Committee, considers that
(a) the work carried out on the basis of such mandate is not progressing satisfactorily given the deadline set, or
(b) the results of the work carried out are not adequate,
the Commission, acting in accordance with the procedure referred to in Article 5(3), may adopt alternative measures to achieve the objectives of the mandate concerned.
4. For the development of implementing rules pursuant to Article 3 which fall outside the remit of Eurocontrol, the Commission shall act in accordance with the procedure referred to in Article 5(3).