22. Regulation 16(b) does not apply in relation to a claim for personal independence payment where on any day—
(a)C is habitually resident in Northern Ireland;
(b)a relevant EU Regulation(1) applies; and
(c)C can demonstrate a genuine and sufficient link to the United Kingdom social security system.
See Article 89(2) of the Welfare Reform (Northern Ireland) Order 2015 for the meaning of “relevant EU Regulation”