Portal:Politics/Selected article/2007, week 51

A unitary state is a state or country whose three organs of state are governed constitutionally as one single unit, with one constitutionally created legislature. The political power of government in such states may well be transferred to lower levels, to regionally or locally elected assemblies, governors and mayors ("devolved government"), but the central government retains the principal right to recall such delegated power.

In a unitary state, any sub-governmental units can be created or abolished, and have their powers varied, by the central government. The process in which sub-government units and/or regional parliaments are created by a central government is known as devolution. A unitary state can broaden and narrow the functions of such devolved (sub-)governments without formal agreement from the affected bodies. In federal systems, by contrast, assemblies in those states composing the federation have a constitutional existence and a set of constitutional functions which cannot be unilaterally changed by the central government. In some such cases, such as in the United States, it is the federal government that has only those powers expressly delegated to it.