This is the first book launching the new Core Law d104 series by Clarus Press. Written specifically for the student, the book provides a comprehensive, accurate, and accessible account of the nature, structure, and functions of the Irish legal system. It includes a coherent account of the constitutional principles and institutional structures which form the building blocks of the Irish legal system, including references to and explanations of important areas of substantive law. Each chapter examines key legal principles and puts each area of law into context. The book also includes a clear statement of the intended learning outcomes to help direct and focus the students' learning. Diagrams, tables, flow-charts, and summaries are utilized to reinforce the information and provide quick visual cues for the understanding of key points contained in the text. The book is fully up-to-date and includes recent legislative and constitutional changes and amendments to EU law. It also includes international treaties between EU Member States to which Ireland has recently become a party. This will be an essential textbook for undergraduate students and others with an interest in the Irish legal system. (Series: The Core d104 Series)