Relationship of international law and municipal law — Convention on International Trade in Endangered Species of Wild Fauna and Flora, 1973 (CITES) — Statute implementing treaty — Animals and Plants (Protection of Endangered Species) Ordinance 1976 — Whether Ordinance to be interpreted by reference to the Convention — Purposive construction

Environment — Convention on International Trade in Endangered Species of Wild Fauna and Flora, 1973 (CITES) — Implementation in municipal law — The law of Hong Kong