Page 230 - The Central Motor Vehicles Rules, 1989

202 THE CENTRAL MOTOR VEHICLES RULES, 1989 RULE 115
(2)
Applies in case of a positive ignition engine.
(ii) Alternatively, the vehicle manufacturers may opt for evaluation of
deterioration factor over normal useful life period as per procedure described
in AIS:137 and as amended time to time.
(iii) Useful life period and minimum service accumulation period for evaluation
of deterioration factor given in Table below:-
Table 2
Minimum service accumulation period – BS-VI
Category of vehicle in which engine will be Useful Life Period Minimum service
installed accumulation period

(1) (2) (3)
Category N1 vehicles 1,60,000 km or 5 years 1,60,000 km
Category N2 vehicles 3,00,000 km or 6 years 1,88,000 km
Category N3 vehicles with GVW equal to or 3,00,000 km or 6 years 1,88,000 km
less than 16,000 kg
Category N3 vehicles with GVW above 7,00,000 km or 7 years 2,33,000 km
16,000 kg
Category M2 vehicles 1,60,000 km or 5 years 1,60,000 km
Category M3 vehicles with GVW equal to or 3,00,000 km or 6 years 1,88,000 km
less than 7,500 kg
Category M3 vehicles with GVW above 7,00,000 km or 7 years 2,33,000 km
7,500 kg
The evaluation of deterioration factor test shall be carried out by the approved
test agency specified in rule 126.
(12) 1 [(a) During type approval and COP applicable from 1st April, 2020, emission
measurement on vehicles using PEMS shall be carried out on road for data
collection and for category M and N vehicles having gross vehicle weight
exceeding 3500 kgs, manufactured on or after 1st April,2023, for all models,
during real world driving cycle emission measurement using PEMS, in-service
Conformity factor shall be applicable as per the procedure laid down in AIS
137 and as amended from time to time.]
(b) The type approval vehicle used for the PEMS demonstration test shall be
representative for the vehicle category intended for the installation of the
engine system. The vehicle may be a prototype vehicle or an adapted
production vehicle.
(c) For PEMS demonstration test at type approval, vehicle shall meet the
requirements of in-service compliance from 1st April, 2023:
2
[PROVIDED that the Maximum Allowed Conformity factors (CF) for
in-service PEMS Emission Testing, shall be as per the Table below:—

1 Substituted vide GSR 226(E), dt. 27-3-2023, w.e.f. 27-3-2023.
2 Inserted ibid.