Key Terms & Concepts — UPSC Mains
42nd Amendment Freeze on Delimitation
"The constitutional freeze that locked Lok Sabha seat allocation to the 1971 Census population to prevent states with successful family planning from losing representation"
The 42nd Constitutional Amendment Act, 1976, froze the allocation of Lok Sabha seats among states based on the 1971 Census population figures. The rationale was to ensure that states actively pursuing family planning programmes would not be penalised with reduced parliamentary representation while states with unchecked population growth gained seats. This freeze was extended by the 84th Constitutional Amendment Act, 2001, until the first Census conducted after 2026. With the freeze set to expire, the debate over fresh delimitation has intensified — northern states (UP, Bihar) stand to gain significantly, while southern states (Tamil Nadu, Kerala, Andhra Pradesh), which achieved below-replacement fertility, fear losing their proportional legislative voice.
A top-priority UPSC topic for GS-2 (Polity — Delimitation, Federalism). UPSC Prelims tests the specific amendment numbers (42nd and 84th), the census basis (1971), and the expiry timeline. Mains questions focus on the tension between democratic representation and federal equity, fiscal federalism implications, and proposed solutions like degressive proportionality or Lok Sabha expansion.
- 1 42nd Amendment (1976) froze seat allocation based on 1971 Census
- 2 84th Amendment (2001) extended freeze until first Census after 2026
- 3 [object Object]
- 4 UP could gain ~48 seats (80 to ~128) under pure population-based delimitation
- 5 Southern states fear loss of proportional political voice despite higher economic contributions
With the 42nd Amendment freeze expiring post-2026, projections show Uttar Pradesh gaining approximately 48 Lok Sabha seats while Kerala could lose one — creating a fundamental tension between one-person-one-vote and cooperative federalism.
