Article 17c 1.

By way of derogation from Article 14, a Member State may authorise, on a duly justified request from an economic operator, the placing on the market or putting into service within the territory of that Member State, of specific equipment referred to in Article 12 and listed in the implementing act referred to in Article 17a(1) and for which the conformity assessment procedures referred to in Article 14 that require the mandatory involvement of a notified body have not been carried out but for which the compliance with all the applicable requirements laid down in this Directive concerning noise emission in the environment has been demonstrated in accordance with procedures referred to in that authorisation.