This section applies in a case where—
An authorised officer may do any or all of the following—
Any power conferred by subsection (2) may be exercised—
A person taken into custody under this section may be kept in custody until the expiry of the period of 72 hours beginning with the time when the person is taken (or first taken) into custody under this section.
But if a transit certificate is issued under section 189A in respect of the non-UK extradition of the person, the person must not be kept in custody under this section after the issue of the certificate.
Subsection (5) does not prevent the person from being taken into custody under section 189A.
An authorised officer searching a person in the exercise of a power conferred by subsection (2)(b) or (c) may seize any item found if the officer has reasonable grounds for believing that the person searched might use the item—