The document discusses the key aspects of a federal system of government, where power is shared between a central national government and various state or provincial governments. It outlines that in a federal system, states are given considerable autonomy through their own legislatures while the central government maintains control over certain issues of national importance. The essential features of a federal system include a precise division of powers between the central and state governments, the supremacy of the constitution, and an independent judiciary to interpret the constitution and resolve disputes over jurisdiction.