it is demonstrated by a risk assessment carried out pursuant to Article 5(1) that concerted action at Union level is required to prevent their introduction, establishment or spread;
léirítear leis an measúnú riosca a dhéantar de bhun Airteagal 5(1) go bhfuil gníomhaíocht ar leibhéal an Aontais de dhíth chun cosc a chur lena dtabhairt isteach, lena mbunú nó lena leathadh;