Delimitation After the Census: Does Population-Based Representation Threaten the Basic Structure of Indian Federalism

The constitutional freeze on the inter-State allocation of Lok Sabha seats, sustained since the Forty-second Amendment and most recently extended by the Eighty-fourth Amendment, is set to lapse with the first census taken after 2026. The prospect of a fresh, population-driven delimitation has revived a long-dormant tension at the heart of the Indian Union: the collision between the egalitarian principle of “one person, one vote” and the federal promise that constituent States retain a meaningful voice in the national legislature. This paper seeks to determine whether a delimitation carried out solely on the basis of population figures will breach the Constitution’s basic structure, particularly considering federalism and democracy as being established basic features of the Constitution via judicial pronouncement. Through an interpretation of the precedent set in Kesavananda Bharati, S.R. Bommai, Kihoto Hollohan and Indra Sawhney, in consideration of the Constitution (One Hundred and Thirty-first Amendment) Bill, 2026 and the Delimitation Bill, 2026, the current paper advances that while population based representation is clearly a constitutional mandate and does not pose any threats to the basic structure per se, the real danger to the basic structure is in the execution thereof, the use of specific census, the suddenness thereof, and weakening of federal safeguards to balance the same.