Mezue ahịrịokwu na-esonụ: Ndezigharị nke Atọ, nke e mere na 1972, nyere Ireland ohere isonye na European Communities. Na 1986, gọọmenti bịanyere aka na Single European Act (SEA). Otú ọ dị, Raymond Crotty rịọrọ ka steeti ahụ ghara ịkwado ya. Na "Crotty v. An Taoiseach" (1987), Ụlọikpe Kasị Elu kpebiri na inyefe ikike ndị ọzọ site na steeti gaa n'aka ụlọ ọrụ ndị Europe n'ime SEA abụghị "ihe dị mkpa site na ibu ọrụ nke ịbụ ndị otu nke Communities" dị ka ndokwa nke Ndezigharị nke Atọ. N'ihi ya, Iwu ahụ chọrọ ndozigharị ọzọ, tupu enwere ike ịkwado SEA. E mere nke a ná ntụli aka e mere ná ngwụsị afọ 1987. N'otu ndabere ahụ, e mere ntụliaka ọzọ banyere nkwekọrịta Europe na nkwekọrịta Maastricht (na 1992), na nkwekọrịta Amsterdam (na 1998), na nkwekọrịta Nice (na 2001 na 2002), na nkwekọrịta Lisbon (na 2008 na 2009)
na 2009). A na-eme ntuli aka maka ikwe ka steeti ahụ jikọta ya na nkwekọrịta Good Friday na 1998, na ịkwado Ụlọikpe Mpụ Mba Nile na 2001 na nkwekọrịta nkwụsi ike na 2012.