Examination of persons arriving at authorised airport
25.—(1)  Every person arriving by air at any authorised airport in Singapore shall, if required by an immigration officer to do so, appear before that officer at such time and place as that officer may direct; and that officer, after such examination as he may consider necessary, shall inform any person whom he considers to be prohibited from entering Singapore under the provisions of this Act or any regulations or orders made thereunder of his finding, and the person shall not leave the precincts of the airport except for a place approved by that officer, and shall leave and depart from Singapore by the first available means in accordance with the instructions of that officer. The captain of the aircraft in which the person arrived shall, if so required by that officer, remove the person from Singapore by the same aircraft.
(2)  Any person who —
(a)refuses or neglects to appear before an immigration officer as required by subsection (1) or who leaves the place of examination without or otherwise than in accordance with the authorisation of that officer;
(b)after being informed by an immigration officer that he is prohibited from entering Singapore, leaves the precincts of an airport without the permission of that officer, or refuses or neglects to proceed to or remain at a place approved by that immigration officer;
(c)refuses or fails to leave Singapore in accordance with the instructions of an immigration officer given under subsection (1); or
(d)being the captain of the aircraft in which any person arrived in Singapore, refuses or neglects to remove the person from Singapore after being informed by an immigration officer that the person is prohibited from entering Singapore or that the person has refused or neglected to appear before an immigration officer as required by subsection (1) or that he has left the place of examination without or otherwise than in accordance with the authorisation of that officer,
shall be guilty of an offence.
(3)  Where any person leaves the precincts of an airport in contravention of this section or refuses to leave and depart from Singapore in accordance with the instructions of an immigration officer given under subsection (1), the immigration officer may take such steps, including the use of force, as may be reasonably necessary to compel that person to return to the precincts of the airport or to comply with those instructions, as the case may be.