Relationship of international law and municipal law — Treaties — Treaties protecting rights of family and child — Effect in municipal law — Powers under Immigration Act 1987 — Whether Minister of Immigration entitled to ignore international instruments

Human rights — Family rights — Articles 23(1) and 24(1) of International Covenant on Civil and Political Rights, 1966 and First Optional Protocol — Article 9(1) and (4) of Convention on the Rights of the Child, 1989 — Change of circumstances — Whether basic rights of family and child need to be taken into account — Child New Zealand citizen — Opportunity to reconsider case in light of rights of child — The law of New Zealand