In a unitary system of government, there is no constitutional division of power among the different levels of government. This means that all power is concentrated in the central government, which can delegate some powers to regional or local governments as it sees fit. The central government is responsible for making laws and policies that apply to the entire country, and regional or local governments are subordinate to it. Unlike a federal system, there is no separate constitution for the regions or local governments, and their powers can be changed or revoked by the central government.