(1) This Ordinance may be called the Illegal Migrants (Determination by Tribunals) Ordinance, 1983,
(2) It extends to the whole of India.
(3) It shall come into force in the State of As>sam at once and in any other State on such date as the Central Government may, by notification in the Official Gazette, appoint and diffeient dates may be appointed for different States and references in this Ordinance to the commencement of this Ordinance shall be construed in relation to any State as references to the date of commencement of this Ordinance in such State.
2. Nothing in this Ordinance shall apply to or in relation to—
(a) any person who was in any State and who had been expelled from that State or Tndia before the commencement pf this Ordinance in that State or in relation to whose expulsion from such State or India »ny order made before such commencement under any other law is in force;
(b) any person detected as a Foreigner at the time of his entry across any border of Tndia;
(c) any foreigner who, having entered into India under a valid passport or travel document, continued to remain therein after the expiry of the period for which he was authorised to remain in Tndia under suck passport or travel document.