<p>The Constitution of India seeks to establish an integrated economic and political union by guaranteeing freedom of trade, commerce and intercourse throughout the territory of India. Part XIII of the Constitution, comprising Articles 301 to 307, provides the constitutional framework for this freedom while simultaneously recognising the legitimate regulatory powers of Parliament and State Legislatures. Article 301 lays down the basic guarantee of free movement of trade, commerce and intercourse, whereas Articles 302 to 305 provide constitutionally permitted limitations and exceptions. Article 306 has been repealed, and Article 307 enables Parliament to establish an authority for implementing the purposes of Part XIII. The Supreme Court has played a significant role in determining the scope of this freedom, particularly through Atiabari Tea Co. Ltd. v. State of Assam, Automobile Transport (Rajasthan) Ltd. v. State of Rajasthan and the Constitution Bench decision in Jindal Stainless Ltd. v. State of Haryana. The later decision in Jindal Stainless clarified the constitutional position concerning taxation and held that a non-discriminatory tax does not, by itself, violate Article 301. This article examines the constitutional scheme, judicial interpretation and contemporary significance of Articles 301&ndash;307, with particular emphasis on the balance between economic integration and the regulatory autonomy of the States.</p>