Legislation is also called statute, or statutory law. It is a law which is approved by a governing body, often a parliament. The body with authority to make legislation is referred to as the legislature. To become law, members of the legislature will often prepare a bill, which will usually by subject to further consideration by the legislature. There are various reasons of having legislation. Some regulations are passed to regulate, typically prohibit, certain acts. In other cases, they are developed to authorize certain governing bodies to perform their role with more authority. There are still other reasons such as to offer certain grants. In many cases the legislation is developed on the basis of or in contrast to some non-legislative act which was in use by some governing body.
Legislative bodies such as Congress or parliament debate on the same before they are approved. Approval of a bill is usually dependent on the priorities of the governing bodies. Persons who can approve such bills are called the legislators. The judiciary, refers to the courts, who must interpret legislation while the executive refers to the administrative branch of government who act on legislation to further government projects.
Kath Hall, Legislation (Butterworths 2002).
Chisholm R, Nettheim G and Chisholm H, Understanding Law (LexisNexis Butterworths 2012)