India, Nov. 12 -- A proposed amendment to India's standards for emission-testing machines would make pollution-under-control (PUC) readings harder to tamper with, while leaving the test's limits and the pollutants it measures unchanged.

Under a proposed amendment to the Automotive Industry Standard (AIS)-137 (Part 8) - dated October 2026 and made under the Central Motor Vehicles Rules - the gas analysers that test petrol vehicles and the smoke meters that test diesel vehicles would have to sign every result digitally and send it straight to a central government server.

Under the proposal, every gas analyser and smoke meter would have to contain a dedicated security chip, a Trusted Platform Module (TPM 2.0), that generates and stores cry...