(1) A Minister of the Crown may by regulations make such provision as the Minister considers appropriate for the purpose of implementing any of the following -

(a) Article 20(1), (3) and (4) of the withdrawal agreement (restrictions of the rights of entry and residence);

(b) Article 19(1), (3) and (4) of the EEA EFTA separation agreement (restrictions of the rights of entry and residence);

(c) Articles 17(1) and (3) and 20(3) of the Swiss citizens’ rights agreement (restrictions of the rights of entry and residence).

(2) If the Minister considers it appropriate, regulations under subsection (1) relating to the implementation of a provision mentioned in subsection (1)(a), (b) or (c) may be made so as to apply both to -

(a) persons to whom the provision in question applies, and

(b) persons to whom that provision does not apply but who -

(i) have entry clearance granted by virtue of relevant entry clearance immigration rules (see section 17),

(ii) have leave to enter or remain in the United Kingdom granted by virtue of residence scheme immigration rules (see section 17), or