234. Fingerprinting.

Fingerprints may be taken by an authorised person1 from the following categories of persons2:


    (1)     any person who, on being required to do so by an immigration officer on his arrival in the United Kingdom3 or in a control zone or supplementary control zone4, fails to produce a valid passport with photograph or some other document satisfactorily establishing his identity and nationality or citizenship5;


    (2)     any person who has been refused leave to enter the United Kingdom but has been granted immigration bail6 if an immigration officer reasonably suspects that he might break any condition imposed on him relating