Article 51 'A', contained in Part IV A of the Constitution deals with Fundamental Duties.

1. Article 15(2)(a) of the Constitution of India says that an Indian citizen has the right to use any restaurant, road or public place.

2. Subject to this article, no citizen shall, by reason of his religion, race, sex, place of birth, or any other similar ground, be prevented from visiting public places.

The Supreme Court of India can issue five types of writs under Article 32 of the Indian Constitution for the enforcement of fundamental rights. These writs are habeas corpus, mandamus, prohibition, quo warranto, and certiorari.

Governments are classified as unitary or federal based on the distribution of power between the central and regional authorities. In a unitary system, all power is concentrated in the central government. In federal systems, power is shared between central and regional governments, each having distinct spheres of authority.

The Unitary System of Government, where power is concentrated at the central level, ensures uniformity, efficiency, and quick decision-making in governance. This system allows for streamlined implementation of policies and laws without regional variations, leading to administrative simplicity. However, the Directive Principles of State Policy, while essential, are distinct principles in the Indian Constitution, guiding social and economic policies, irrespective of the system of government in place.