Specific requirements to apply that principle are provided for in Union rules on protective measures against pests of plants, which prohibit the introduction into the Union of certain pests which are not present (or only present to a limited extent) in the Union, in Union rules laying down animal health requirements, which allow the entry of animals and of certain products of animal origin into the Union only from third countries which are included in a list set up for that purpose, and in Union rules for the organisation of official controls on products of animal origin intended for human consumption, which also provide for the establishment of a list of third countries from which those products can enter the Union.
Foráiltear do cheanglais shonracha chun an prionsabal sin a chur i bhfeidhm i rialacha an Aontais maidir le bearta cosantacha i gcoinne lotnaidí plandaí, lena gcuirtear toirmeasc ar lotnaidí áirithe a thabhairt isteach san Aontas nach bhfuil i láthair (nó nach bhfuil forleathan) san Aontas, i rialacha an Aontais lena leagtar síos ceanglais maidir le sláinte ainmhithe, lena gceadaítear teacht isteach ainmhithe agus táirgí áirithe de bhunadh ainmhíoch san Aontas ó na tríú tíortha sin amháin a áirítear ar liosta arna bhunú chun na críche sin, agus i rialacha an Aontais maidir le rialuithe oifigiúla i ndáil le táirgí de bhunadh ainmhíoch le caitheamh ag an duine a eagrú, lena bhforáiltear freisin liosta a bhunú de thríú tíortha ónar féidir na táirgí sin a thabhairt isteach san Aontas.