Changes to the Immigration Ordinance to prevent a big influx of mainland children may not be effective, according to a member of the Immigration Tribunal. The Chief Executive-designate's office may force mainland children who have the right of abode after the handover to first get a certificate issued by both Hong Kong and the mainland. Otherwise they would be considered illegal immigrants and face deportation. The adjudicator said the Immigration Ordinance allows anyone about to be deported the right to appeal to the tribunal. 'If a child appeals and presents enough evidence to support his right of abode after the handover as provided under the Basic Law, we have to allow him to stay in the territory. 'A marriage certificate of a child's parents and his record of birth in a mainland hospital are enough for an adjudicator to rule he shall have the permanent residency stated in the Basic Law.' And he warned such a certificate may have to cover all children born to Hong Kong people anywhere in the world.