The emphasis of this book is on facilitating practitioners to implement judicial review procedure. It relies primarily on Irish authority and Irish jurisprudence. This highly practical book examines the impact of judicial review as prescribed by Order 84, Part V, rules 18-27, of the Rules of the Supreme Court, 1986. It considers judicial review from both a procedural and a substantive legal perspective. In recent times this has become one of the most important branches of law and is experiencing tremendous growth. The judicial review procedure has been the vehicle by which Irish public law has evolved in a dynamic and distinctive fashion, with much of its jurisprudence illustrating the tensions between an inherited common law tradition and an indigenous Constitution.