21.—(1) The holder of a biometric immigration document must provide his document to an immigration officer or the Secretary of State, as applicable, —
(a)where he is examined by an immigration officer under paragraph 2, 2A or 3 of Schedule 2 to the Immigration Act 1971;
(b)where he is examined by an immigration officer under Article 7(2) of the Immigration (Leave to Enter and Remain) Order 2000(1);
(c)where he is examined by the Secretary of State under Article 3 of the Immigration (Leave to Enter) Order 2001(2);
(d)where he makes an application for further leave to remain to the Secretary of State;
(e)when his dependant makes an application for entry clearance, leave to enter or leave to remain as his dependant; or
(f)when he is the sponsor under the immigration rules of a person who seeks entry clearance, leave to enter or leave to remain in the United Kingdom.
(2) Where the holder of a biometric immigration document attends premises to take a test known under the immigration rules as the “Life in the UK Test”, he must provide his document to the representative of the educational institution, or other person, who is administering the test.
(3) The holder of a biometric immigration document must provide his document to a prospective employer or employer —
(a)prior to the commencement of his employment; and
(b)on the anniversary of the date that the document was first produced, provided he is still working for that employer on that date.