50.—(1) Any person reasonably believed to be a person liable to removal from Singapore under any of the provisions of this Act may be questioned by an immigration officer.
(2) The person shall fully and truthfully answer all questions and enquiries put to him by the immigration officer tending, directly or indirectly, to establish his identity, nationality or occupation or bearing on any of the restrictions contained in this Act or the regulations, and shall disclose and produce to that officer on demand all documents in his possession relating to those matters.
(3) All such answers and documents shall be admissible in evidence in any proceedings under this Act against the person making or producing the same.
(4) Nothing in this section shall be construed as rendering any such answers inadmissible in any other proceedings in which they would otherwise be admissible.