This section defines key expressions for the purposes of sections 22-28.
	Subsection (2) defines a "relevant person" as someone who has entered or arrived in the United Kingdom as per subsection (3) and has not subsequently been granted leave to enter or remain after their arrival.
	Subsection (3) sets out the types of irregular entry or arrival in the United Kingdom which inform whether a person is a "relevant person" under subsection (2).
	Subsection (4) defines a ‘relevant article’ as anything which appears to an authorised officer (see subsection (6) for definition of "authorised officer") to be a thing on which information that relates, or may relate, to the commission (whether in the past or future) of an offence under section 25 or 25A of the Immigration Act 1971 is, or may be stored in electronic form. Section 25 and 25A are the offences of assisting unlawful immigration to a member State or the United Kingdom and helping an asylum-seeker to enter the United Kingdom.
	Subsection (5) applies section 11(1) of the Immigration Act 1971 to this section. Section 11(1) (person deemed not to enter United Kingdom before disembarkation, while in controlled area or while under immigration control) provides for the distinction between entering and arriving into the United Kingdom.
	Subsection (6) defines "authorised officer" as meaning Immigration Officers, Police Service of Scotland, Police Service of Northern Ireland and National Crime Agency officers (NCA officers). There is also a power in section 28 for the Secretary of State to make regulations to provide that reference in this section (and in sections 23, 24 and 25) to an "authorised officer" includes a person described in those regulations.
	Further detail on a ‘relevant article’ is provided at section 29.
Part 1: Border Security Powers of search etc in relation to electronic devices Section 22: Meaning of key expressions