This book provides the full text of Part XX.1 of the Criminal Code, which governs the treatment of mentally disordered accused individuals within the Canadian criminal justice system. Carefully annotated and supplemented with expert commentary, it offers practical insights and clarifications of key points in the legislation. Designed as a focused and accessible reference, the book is invaluable for legal practitioners navigating issues of criminal responsibility and fitness, as well as for mental health professionals involved in assessment and expert testimony before criminal courts or review boards. The annotations help clarify complex legal concepts and procedures, making the legislation easier to understand and apply in practice. Whether used in court, during assessments, or for quick consultation, this resource bridges the gap between legal requirements and clinical realities. Its concise format and targeted content make it an essential tool for anyone working at the intersection of mental health and criminal law, and its annual publication ensures that it serves as a concise, up-to-date guide to the ever-evolving field of mental disorder law in Canada.