Border control is in the interest not only of the Member State at whose external borders it is carried out but of all Member States which have abolished internal border control.
Ní chun leasa na mBallstát sin a ndéantar rialú teorann ag a dteorainneacha seachtracha amháin atá an rialú teorann, ach chun leasa na mBallstát uile a chuir deireadh le rialú ag teorainneacha inmheánacha.