Portal:Politics/Selected article/2007, week 51
A 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 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.