Member States shall designate at the appropriate levels the competent authorities and bodies responsible for the following:
(a)((a)) assessment of ambient air quality;
(b)((b)) approval of measurement systems (methods, equipment, networks and laboratories);
(c)((c)) ensuring the accuracy of measurements;
(d)((d)) analysis of assessment methods;
(e)((e)) coordination on their territory if Community-wide quality assurance programmes are being organised by the Commission;
(f)((f)) cooperation with the other Member States and the Commission.
Where relevant, the competent authorities and bodies shall comply with Section C of Annex I.