The Chief Executive-designate's Office has yet to work out a feasible plan to prevent an influx of illegal mainland child migrants after the handover, according to SAR executive councillor Henry Tang Ying-yen. Mr Tang said yesterday that they were still formulating a plan which would resist possible court challenges from children's parents. The handover team is also asking for more involvement from the Chinese side in approving one-way permits. He reiterated that the Special Administrative Region government would be tough on illegal immigrants and they would be deported. Mr Tang said although the right of abode of Hong Kong people's children born in the mainland could not be denied, the territory could not take all migrants at once. The taskforce headed by Chief Secretary Anson Chan Fang On-sang is exploring options to solve the problem. He hoped relevant legislative amendments could be tabled to the provisional legislature as soon as possible. They are looking at what the administration can do on the procedure to confirm a child's residency, he said. It was earlier reported that the Chief Executive-designate's Office might force mainland children who have the right of abode after the handover first to get a certificate issued by both Hong Kong and the mainland. Otherwise they would be considered illegal immigrants and face deportation. But Mr Tang declined to say whether the taskforce, which is also looking at other right of abode issues, would provide help to the post-handover government in drafting legislation on permanent residency.