"The Retrofitment of hybrid electric system kit to vehicles having Gross Vehicle Weight not exceeding 3,500 kg shall be permitted if...it conforms to Bharat Stage-II or subsequent emission norms...it was not retrofitted earlier," Ministry of Road Transport and Highways said in the notification.
It mentions that the installation of type approved hybrid electric system kit shall be done only by an installer authorised by the manufacturer or supplier of such kits. The rules - Central Motor Vehicles (Seventh Amendment) Rules, 2016 -- were notified following amendment in the Central Motor Vehicles Rules, 1989.
The notification also mentions that the conversion of vehicles for pure electric operation with fitment of electric kit shall be permitted if the vehicle was manufactured on or after January 1, 1990 and "it is not provided with permits for carrying dangerous or hazardous goods, as defined in CMV Rules, 1989."