The act of making legislation is sometimes known as legislating. Under the doctrine of separation of powers, the law-making function is primarily the responsibility of the legislature. However, there are situations where legislation is enacted by other means (most commonly when constitutional law is enacted). These other forms of law-making include referenda and constitutional conventions. The term "legislation" is sometimes used to describe these situations, but other times, the term is used to distinguish acts of the legislature from these other lawmaking forms.