In exceptional cases, where, at a particular airport, there are specific infrastructural difficulties requiring a longer period of time for adaptations in order to allow for the carrying-out of systematic checks against the databases without having a disproportionate impact on the flow of traffic, the six-month transitional period referred to in the first subparagraph may be prolonged for that particular airport by a maximum of 18 months in accordance with the procedure specified in the third subparagraph.
I gcásanna eisceachtúla, i gcás ina bhfuil deacrachtaí sonracha bonneagair ann ag aerfort áirithe a éilíonn tréimhse ama níos faide i gcomhair oiriúnuithe d’fhonn go mbeifear in ann seiceálacha córasacha a dhéanamh sna bunachair sonraí gan tionchar díréireach a bheith aige sin ar an sreabhadh tráchta, féadfar an idirthréimhse sé mhí dá dtagraítear sa chéad fhomhír a fhadú don aerfort áirithe sin suas go dtí uastréimhse 18 mí i gcomhréir leis an nós imeachta a shonraítear sa tríú fomhír.