Where, in the area without internal border control, there is a serious threat to public policy or internal security in a Member State, that Member State may exceptionally reintroduce border control at all or specific parts of its internal borders for a limited period of up to 30 days or for the foreseeable duration of the serious threat if its duration exceeds 30 days.
I gcás ina bhfuil baol tromchúiseach ann do bheartas poiblí nó do shlándáil inmheánach sa limistéar gan rialú teorann ag teorainneacha inmheánacha i mBallstát, féadfaidh an Ballstát sin rialú teorann a athbhunú ar bhonn eisceachtúil ag a theorainneacha inmheánacha uile nó ag codanna sonracha dá theorainneacha inmheánacha ar feadh tréimhse teoranta 30 lá ar a mhéid nó ar feadh ré intuartha an bhaoil thromchúisigh má mhaireann sé níos faide ná 30 lá.