Sch 5 para 19
(1) If an NCA officer is designated as a person having the powers of an immigration officer, the NCA officer has, in relation to any relevant matter, the same powers as an immigration officer would have. (2) But that is subject to any limitation included in the designation. (3) In this paragraph “ relevant matter ”, in relation to a particular power of an immigration officer, means a matter in relation to which that power may be exercised.