In an area without internal border control, it is necessary to have a common response to situations seriously affecting the public policy or internal security of that area, of parts thereof, or of one or more Member States, by allowing for the temporary reintroduction of internal border control in exceptional circumstances, but without jeopardising the principle of the free movement of persons.
I limistéar gan rialú ag teorainneacha inmheánacha, tá gá le freagairt choiteann ar chásanna a théann i bhfeidhm go mór ar bheartas poiblí nó ar shlándáil inmheánach an limistéir sin, nó codanna de, nó Ballstáit amháin nó níos mó trína cheadú gur féidir rialú ag teorainneacha inmheánacha a athbhunú go sealadach i gcúinsí eisceachtúla, ach gan prionsabal na saorghluaiseachta daoine a chur i mbaol.