In a federal system, the central (or federal) government has much more authority than in a confederal system. The central government controls more trade policy, and makes decisions about policy areas that involve interactions between states (such as highway systems).
Nationality is a legal relationship between an individual person and a state. Nationality affords the state jurisdiction over the person and affords the person the protection of the state. What these rights and duties are vary from state to state.
What is the definition of Citizenship. A citizen is a participatory member of a political community. Citizenship is gained by meeting the legal requirements of a national, state, or local government. A nation grants certain rights and privileges to its citizens. In return, citizens are expected to obey their country's laws and defend it against its enemies.