The Supreme Court banned the sale of vehicles that are not compliant with Bharat Stage IV (BS IV) fuel from April 1, 2017.

This would be applicable to all two wheeler, three wheeler, four wheeler, and commercial vehicles.

The Court also directed all vehicle registering authorities under the Motor Vehicles Act, 1988 to not register vehicles that do not comply with BS IV fuel standards from April 1, 2017, unless these vehicles were sold before March 31, 2017.

As compared to BS III fuel, BS IV fuel has lesser emissions of carbon monoxide, hydrocarbons, nitrogen oxide, and sulphur oxide.

Bharat stage emission standards (BSES) are emission standards instituted by the Government of India to regulate the output of air pollutants from internal combustion engines and Spark-ignition engines equipment, including motor vehicles. The standards and the timeline for implementation are set by the Central Pollution Control Board under the Ministry of Environment & Forests and climate cha