Relationship of international law and municipal law — Treaties — Effect in municipal law — International Covenant on Civil and Political Rights, 1966 — Article 12(4) — Right not to be arbitrarily deprived of right to enter one’s own country — Cancellation of permanent visa — Whether visa cancellation contrary to Article 12(4) right — Whether procedural fairness requiring respondent to notify visa-holder of possible non-compliance with Article 12(4) and to invite submissions on same prior to cancellation — Whether potential non-compliance with Article 12(4) is mandatory relevant consideration — Decision in Teoh — Effect — United Nations Convention on the Rights of the Child, 1989 — Relevance

Aliens — Visa cancellation — Migration Act 1958 (Cth) — Australia’s international obligations — Whether Minister required to consider international obligations if not arising from representations made on behalf of affected person — International Covenant on Civil and Political Rights, 1966 — Article 12(4) — Whether decision of Minister consistent with Article 12(4) — Decision in Teoh — Effect — United Nations Convention on the Rights of the Child, 1989 — Relevance — The law of Australia