The Social Security (Ireland) Order (Northern Ireland) 2007

(2) Subject to Article 14(3) and (5), a person who continues to be entitled to receive sickness benefit under the legislation of Great Britain, Northern Ireland or the Isle of Man while he is in Ireland may, after having received, or been deemed to have received, 364 days sickness benefit, become entitled to receive invalidity benefit under the legislation of Great Britain, Northern Ireland or the Isle of Man while he is in Ireland, provided that he continues to satisfy the insurance authority of the former Party that he remains incapable of work.