India, March 23 -- Over 1.2 million of 2.5 million vehicles in Delhi have affixed colour-coded stickers (CCS) to indicate fuel type, the Delhi government informed the Supreme Court in an affidavit earlier this week.

The government's response came on a top court's order dated January 27, when it called for states in the national capital region (NCR) to ensure their roll-out, even for vehicles registered before April 2019, when the stickers were mandated under the Motor Vehicles Act.

The Delhi government, in its response, told the court that the sticker roll-out was a continuous exercise and that all vehicles in Delhi will have CCS "at the earliest". To be sure, the 2.5 million vehicles in Delhi exclude two-wheelers and e-rickshaws.

A be...