Its purpose is to guarantee that every decision is based on a specific examination and that no single measure can be taken to expel all persons having the nationality of a particular State (see also Article 13 of the Covenant on Civil and Political Rights).
I sé an cuspóir atá leis a ráthú go bhfuil scrúdú sonrach mar bhunús le gach breith agus nach bhféadfar aon bheart aonair a ghlacadh chun na daoine go léir a bhfuil náisiúntacht Stáit ar leith acu a dhíbirt (féach freisin Airteagal 13 den Chúnant um Chearta Sibhialta agus Polaitiúla).