Article VI: Facilities and services 1. For the execution of the programmes entrusted to it, the Agency (a) shall maintain the internal capability required for the preparation and supervision of its tasks and, to this end, shall establish and operate such establishments and facilities as are required for its activities; (b) may enter into special arrangements for the execution of certain parts of its programmes by, or in co-operation with, national institutions of the Member States, or for the management by the Agency itself of certain national facilities. 2. In implementing their programmes, the Member States and the Agency shall endeavour to make the best use of their existing facilities and available services as a first priority, and to rationalise them; accordingly they shall not set up new facilities or services without having first examined the possibility of using the existing means.