Until the list referred to in Article 50(2) has been established, Member States may maintain national provisions dealing with parts or equipment which may affect the correct functioning of systems essential for the safety of the vehicle or its environmental performance.
Go dtí go mbunófar an liosta dá dtagraítear in Airteagal 50(2), féadfaidh na Ballstáit a gcuid forálacha náisiúnta a choimeád ar bun maidir le páirteanna nó trealamh a d’fhéadfadh cur isteach ar fheidhmiú ceart córas atá fíor-riachtanach ó thaobh shábháilteacht nó feidhmíocht chomhshaoil na feithicle de.