Organization of the relation between the Centre and the units. Ideally, in a federal State, the Centre and the units ought to be mutually independent in the spheres allotted to each by the constitution--- in legislation, in administration, and in finance. This mutual independence is indeed the distinguishing principle of federalism and it con by truly said that the greater the independence of the units from the Centre in their defined spheres, the more truly is the political system federal in character. In actual practice, this ideal condition rarely obtains. Various points of contact are established between the two, partly by law and partly by usage.