The use of legislative history and legislative evolution as aids to interpret legislative intent was affirmed by the Supreme Court of Canada in 1998. Since then, legislative history research has become important to the legal profession. Researching legislative intent, however necessary, is not straightforward. The wealth of materials available requires researchers to understand the legislative process, and to locate and use a variety of parliamentary materials, websites, and libraries. Researching Legislative Intent: A Practical Guide is the first comprehensive resource that guides researchers through this complex task. Starting with the history of the use of legislative intent in the courts and an overview of the legislative process, this book then provides detailed descriptions of the sources available to compile a legislative history and trace the evolution of statutes and regulations. It also looks at the background of the use of legislative intent in interpreting treaties with Indigenous peoples and provides research checklists. It will be a go-to resource for legal researchers in law firms; academic institutions; and government, courthouse, and law society libraries.