( 1 ) IA No. 142 has been filed by the Union of India with the following prayers: (A) direct that henceforth no new private (non-commercial) CNG vehicles be registered and no conversion of the existing private (non-commercial) vehicles to CNG mode be allowed by GNCTD and further direct that CNG be supplied from the earmarked CNG stations only to such private vehicles that are certified as duly registered up to the cut-off date by the registering authority of GNCTD; (B) direct/clarify that four-stroke petrol-driven autos plying on unleaded low benzene petrol, which has been observed by this Honble court as "clean fuel" in its order dated 26-3-2001, be/can be registered in GNCTD; (C) direct freezing the number of autos/taxis/rtvs on CNG mode at the following level: (i) autos/taxis/rtvs registered up to now; plus (ii) autos/taxis to be registered by those who had placed firm orders by 31-3-2001 with the manufacturers/conversion agencies in compliance with the Court order of 26-3-2001. (D) direct that the city bus fleet in NCT may comprise of Bharat stage II emission-compliant buses using CNG or diesel as fuel, and that the bus operators have the option to ply Bharat Stage II emission-