By establishing a customs union between themselves Member States aim to contribute, in the common interest, to the harmonious development of world trade, the progressive abolition of restrictionson international trade and the lowering of customs barriers.
Trí aontas custaim a bhunú eatarthu féin, tá d’aidhm ag na Ballstáit cuidiú, ar mhaithe leis an leas coiteann, le forbairt chomhchuíar thráchtáil an domhain, le díothú comhleanúnach srianta ar antrádáil idirnáisiúnta agus le hísliú bacainní custaim.