Nevertheless, Irish citizenship continued to be extended to the inhabitants of Northern Ireland for over 40 years, representing, according to Ó Caoindealbháin, "one of the few practical expressions of the Irish state’s irredentism." Ó Caoindealbháin concludes, however, that the Good Friday Agreement of 1998 altered significantly the territorial implications of Irish citizenship law, if somewhat ambiguously, via two key provisions: the renunciation of the constitutional territorial claim over Northern Ireland, and the recognition of "the birthright of all the people of Northern Ireland to identify themselves and be accepted