All citizens are required to act within the law and simultaneously are protected by the law. However, as a potentially vulnerable group, people with intellectual disabilities are sometimes identified specifically in law for their protection. More general legislation is sometimes highly relevant to people with intellectual disabilities and can impinge on the practice of the nurse for people with intellectual disabilities. This chapter presents a thorough overview of a range of primary legislation relevant for students and nurses for people with intellectual disabilities. Where appropriate, relevant legislation is outlined for each of the jurisdictions of the UK and the Republic of Ireland. Where a student finds an omission for the jurisdiction in which they are working, they will find helpful resources and may also find it useful to append their own notes to the sections within the chapter; the layout of the book has been designed for students to make relevant notes on.