Legislation is the process or result of enrolling, enacting, or promulgating laws by a legislature, parliament, or analogous governing body. Before an item of legislation becomes law it may be known as a bill, and may be broadly referred to as "legislation" while it remains under consideration to distinguish it from other business. Legislation can have many purposes: to regulate, to authorize, to outlaw, to provide (funds), to sanction, to grant, to declare, or to restrict. It may be contrasted with a non-legislative act by an executive or administrative body under the authority of a legislative act.

A bill is a proposal for a new law, or a proposal to significantly change an existing law. A bill does not become law until it is passed by the legislature and has been, in most cases, approved by the executive. Once a bill has been enacted into law by the legislature, it is called an act of the legislature, or a statute. Bills are introduced in the legislature and are discussed, debated and voted upon.