Page 283 - The Central Motor Vehicles Rules, 1989

RULE 115B THE CENTRAL MOTOR VEHICLES RULES, 1989 255
1 2
[E. [CNG/Bio-CNG/LNG] vehicles or kit components, including their installation,
shall conform to the safety checks given in the Annexure IX.]
F. Testing agencies shall issue every Type Approval certificate containing the “Safety
and Procedural Requirements for Type Approval of CNG and LPG Operated Vehicles”
for CNG vehicles and conversion kits, as mentioned in Annexure X.
Note : 1. For the purpose of these rules; “O.E. fitment” means the vehicles which
are manufactured for CNG operation by the vehicle manufacturer prior to their first
registration.
2. “Conversion of In-use Gasoline Vehicle” means a vehicle already registered as
a gasoline vehicle and is subsequently converted for operation on CNG by fitting the
conversion kit and carrying out the other necessary changes.
3. “O.E. CNG Dedicated Vehicles” mean the vehicles which are manufactured for
CNG operation by the vehicle manufacturer prior to their first registration.
3
[3(a) “O.E. LNG Dedicated Vehicle” means the vehicles which are manufactured
for LNG operation by the vehicle manufacturers prior to their first registration.]
4. “Converted diesel vehicle” means a vehicle already registered as a diesel vehicle
and is subsequently converted for operation on CNG by modifying the diesel engine
fitted on that vehicle by fitting the conversion kit and carrying out the other necessary
changes.
5. “Retrofitment” (or replacement) of diesel vehicle means a vehicle already
registered as a diesel vehicle and is subsequently converted for operation on CNG fitting
a new engine adapted to operate on CNG.
6. The AIS or IS specifications may be amended from time to time.
4
[7. In case of conversion kits on in-use gasoline vehicles or converted diesel
vehicles, the validity of the type approval certificate issued by the testing agencies shall
cover vehicles manufactured between the year of manufacture of the vehicle, on which
such kit has been tested and date of the validity of the applicable norms prescribed for
such category of vehicles as per clause (a) of item (II) of part A of rule 115B. Testing
agencies shall be required to indicate specifically the model and their variants for diesel
vehicles and capacity range of gasoline vehicles on which the certificate shall be valid
for conversion.]
5
[8. O.E. Diesel and Dual Fuel CNG or Bio-CNG or LNG Vehicle means vehicles
which are manufactured for diesel and dual fuel CNG or Bio-CNG or LNG operation
by vehicle manufacturer prior to their first registration.
9. Converted diesel vehicle to CNG or Bio-CNG or LNG dual fuel vehicle or
dedicated LNG Vehicle means a vehicle already registered as diesel vehicle and is
subsequently converted for CNG or Bio-CNG or LNG dual fuel or dedicated LNG by
adding the CNG or Bio-CNG or LNG kit and other necessary changes.
10. Dual fuel engine operation shall mean a two-fuel system having diesel as a
primary combustion fuel and CNG or Bio-CNG or LNG as supplementary fuel. Such
dual fuel engine may operate on diesel stand-alone mode in absence of gaseous fuel.

1 Substituted vide GSR 534(E), dt. 24-7-2014, Gazette dt. 24-7-2014, w.e.f. 25-7-2015.
2 Substituted for “CNG” vide GSR 643(E), dt.27-6-2017, w.e.f. 27-6-2017.
3 Inserted, ibid.
4 Substituted vide GSR 589(E), dt. 16-9-2005, w.e.f. 16-9-2006.
5 Inserted vide GSR 1151(E), dt. 29-11-2018, w.e.f. 29-11-2018.