Uniform and high-quality external border control is essential for strengthening the area of freedom, security and justice. In accordance with common Union standards, the Instrument should support measures relating to the management of external borders, to be implemented in accordance with the four-tier access control model which comprises measures in third countries, cooperation with neighbouring countries, border control measures and control measures within the area of free movement in order to prevent illegal immigration and cross-border crime inside the Schengen area.
Tá rialú teorainneacha seachtracha, atá aonfhoirmeach agus ar ardcháilíocht, riachtanach do neartú an limistéir saoirse, slándála agus ceartais. i gcomhréir le comhchaighdeáin an Aontais, ba cheart go dtacódh an Ionstraim le bearta a bhaineann le bainistiú na dteorainneacha seachtracha, atá le cur i bhfeidhm i gcomhréir leis an tsamhail rialaithe rochtana ceithre chiseal a chuimsíonn bearta i dtríú tíortha, comhar le tíortha comharsanachta, bearta rialaithe teorann agus bearta rialaithe laistigh de limistéar na saorghluaiseachta chun inimirce neamhdhlíthiúil agus coireacht trasteorann laistigh de limistéar Schengen a chosc.