Parts or equipment that may pose a serious risk to the correct functioning of systems that are essential for the safety of the vehicle or for its environmental performance shall not be placed on the market, registered or enter into service and shall be prohibited, unless they have been authorised by an approval authority in accordance with Article 51(1) and (4).
Páirteanna nó trealamh a d’fhéadfadh riosca tromchúiseach a chothú do dhea-fheidhmiú córas atá fíor-riachtanach ó thaobh shábháilteacht nó fheidhmíocht chomhshaoil na feithicle de, ní dhéanfar iad a chur ar an margadh, a chlárú nó a chur i seirbhís agus déanfar iad a thoirmeasc, mura rud é go bhfuil siad údaraithe ag údarás ceadaithe i gcomhréir le hAirteagal 51(1) agus (4).