Section 18

Subject to section 10, a banishment or expulsion order shall, until it has been set aside or revoked under the provisions of this Act, or until it has expired, as the case may be, be conclusive evidence in all courts and for all purposes that the person thereby ordered to be banished or expelled is not a citizen of Singapore or an exempted person.

An endorsement on a banishment or expulsion order that it has been executed by placing the person named therein on a ship or aircraft shall be conclusive evidence until the contrary is proved that the person ordered to be banished or expelled has been sent out of Singapore.