India withdraws revised earthquake zoning notification
Change
India withdrew the Bureau of Indian Standards' November 6, 2025 Gazette notification revising IS 1893 (Part 1): 2025 and restored the IS 1893 (Part 1): 2016 seismic design code effective March 3, 2026.
Why it matters
The withdrawal blocks immediate enforcement of the 2025 probabilistic seismic hazard assessment parameters and the newly proposed higher-risk Zone classifications. That removes the regulatory requirement for projects to upgrade structural designs or add reinforcement to meet the withdrawn peak-ground-acceleration values in the short term.
Implications
- • Metro Rail corporations' engineering and design teams must continue using IS 1893 (Part 1): 2016 specifications for current and ongoing designs rather than adopting the withdrawn 2025 parameters.
- • Real estate developers' structural design teams must refrain from redesigning or retrofitting projects on the basis of the withdrawn seismic hazard values for projects already under financial closure.
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Topics
Policy & Regulation Regulatory Actions Environmental Regulation