Constitutional laws are often referred to as rules about establishing rules, or second-order rulemaking. It controls the interactions between the executive, legislative, and judicial branches with the bodies it controls. The identification of power structures and hierarchies is one of the primary functions of constitutions in this situation. For instance, in a unitary state, the constitution will grant a single central government, legislature, and judiciary the last say, even when there is frequently a transfer of power or jurisdiction to local or municipal authorities. When a constitution creates a federal state, it will specify the several levels of government that coexist with either shared or exclusive regions of jurisdiction over enacting, enforcing, and applying laws.