Federalism is the mixed or compound mode of government, combining a general government with regional governments in a single political system. the following are some key features of federalism
The presence of constituent parts called republics, states, etc.
The relations between the federation and its entities are governed by the Federal Constitution.
Foreign policy activities are conducted by the federal government on behalf of all entities.
The bicameral structure of the federal parliament where one is the organ of the federal government, and the other is representing the interests of the federation (this is a mandatory feature of a federal state). with a Written Constitution
The regions may issue their own constitution, decrees and other normative-legal acts that will be legal in their territory on a par with the federal constitution and federal laws.
The subjects of the federation can have their own flags, emblems anthems and all other signs of the state, except state sovereignty.
The subjects of the federation cannot be independent subjects of international relations.