A Piece of Legislation is a formal document that is enacted by a legislature or governing body to regulate a particular activity. An ACT, which is three letters long, is a type of legislation that is passed by a legislature and is usually used to create, amend, or repeal laws. A STATUTE, which is seven letters long, is a written LAW that is enacted by a legislature and is usually enforced by the government. Lastly, a LAW, which is three letters long, is a system of rules that are created and enforced through social or governmental institutions to regulate behavior.