The emphasis should be placed, in accordance with the principle of subsidiarity, on areas where there are clear cross-border or internal market issues at stake, or where there are significant advantages and efficiency gains from collaboration at Union level.
Ba cheart béim a leagan, i gcomhréir le prionsabal na coimhdeachta, ar réimsí ina bhfuil ceisteanna soiléire a bhaineann leis an margadh trasteorann nó leis an margadh intíre nó, ina bhfuil buntáistí agus gnóthachain éifeachtúlachta suntasacha ann a eascróidh as comhoibriú ar leibhéal an Aontais.