RELATIONS BETWEEN THE UNION AND THE STATES
Article 251: Inconsistency between laws made by Parliament under articles 249 and 250 and laws made by the Legislatures of States
Nothing in articles 249 and 250 shall restrict the power of the Legislature of a State to make any law which under this Constitution it has power to make, but if any provision of a law made by the Legislature of a State is repugnant to any provision of a law made by Parliament which Parliament has under either of the said articles power to make, the law made by Parliament, whether passed before or after the law made by the Legislature of the State, shall prevail, and the law made by the Legislature of the State shall to the extent of the repugnancy, but so long only as the law made by Parliament continues to have effect, be inoperative.
About Constitution of India
WE, THE PEOPLE OF INDIA, having solemnly resolved to constitute India into a SOVEREIGN SOCIALIST SECULAR DEMOCRATIC REPUBLIC and to secure to all its citizens: JUSTICE, social, economic and political; LIBERTY of thought, expression, belief, faith and worship; EQUALITY of status and of opportunity; and to promote among them all FRATERNITY assuring the dignity of the individual and the unity and integrity of the Nation; IN OUR CONSTITUENT ASSEMBLY this twenty-sixth day of November, 1949, do HEREBY ADOPT, ENACT AND GIVE TO OURSELVES THIS CONSTITUTION