Subject to the following provisions of this section, this Act extends to—
Section 23 (investigations and detention: England and Wales and Northern Ireland) extends to England and Wales and Northern Ireland only.
An amendment, modification or repeal by this Act has the same extent as the enactment or relevant part of the enactment to which it relates (ignoring extent by virtue of an Order in Council under any of the Immigration Acts).
Subsection (3) does not apply to—
Her Majesty may by Order in Council provide for any of the provisions of this Act, other than any provision of Part 1 (border functions) or section 53 (transfer of certain immigration judicial review applications), to extend, with or without modifications, to any of the Channel Islands or the Isle of Man.
Subsection (5) does not apply in relation to the extension to a place of a provision which extends there by virtue of subsection (3).