NEW DELHI, Aug. 9 -- Amid delays in rolling out the indigenous Bharat Vecto testing tool for truck fuel economy, the Bureau of Energy Efficiency (BEE) is considering introducing constant speed fuel consumption (CSFC) norms from April 2027 as an interim measure, with a possible shift to the more comprehensive Vecto-based testing in a later phase.

While the first phase, or block period, will run for three years until March 2030, the BEE is open to incorporating Bharat Vecto-based targets in the second phase from April 2030 to 2032, according to two people aware of the development and a government document reviewed by Mint.

The block period arrangement takes a leaf out of BEE's own July 2026 proposal for CAFE 3 norms for cars, and will be ...