Full Text
REGD. No. D. L.-33004/99
The Gazette of India
CG-DL-E-27072026-274834
EXTRAORDINARY
PART II—Section 3—Sub-section (i)
PUBLISHED BY AUTHORITY
No. 575]
NEW DELHI, THURSDAY, JULY 16, 2026/ASHADHA 25, 1948
MINISTRY OF ROAD TRANSPORT AND HIGHWAYS
NOTIFICATION
New Delhi, the 13th July, 2026
G.S.R. 634(E). — The following draft of certain rules further to amend the Central Motor Vehicles
Rules, 1989, which the Central Government proposes to make in exercise of the powers conferred by section
110 of the Motor Vehicles Act, 1988 (59 of 1988), is hereby published as required by sub-section (1) of
section 212 of the said Act, for information of all persons likely to be affected thereby; and notice is hereby
given that the said draft rules will be taken into consideration after the expiry of thirty days from the date on
which the copies of this notification as published in the Gazette of India, are made available to the public;
The objections or suggestions which may be received from any person in respect of the said draft
rules before the expiry of the aforesaid period will be considered by the Central Government.
Objections and suggestions to these draft rules, if any, may be sent to the Additional Secretary (MVL,
Transport & Road Safety), Ministry of Road Transport and Highways, Transport Bhawan, Parliament Street,
New Delhi-110 001 or on the email: [email protected];
Draft Rules
1. Short title and commencement. — (1) These rules may be called the Central Motor Vehicles (..........
Amendment) Rules, 2026.
(2) Save as otherwise provided in these rules, they shall come into force on the date of their final publication
in the Official Gazette.
1. In the Central Motor Vehicles Rules, 1989, (hereinafter referred to as the said rules), in rule 115, in
sub-rule 18, after clause (i), the following clause shall be inserted, namely: -
"(iB) The Emission Standards for Bharat Stage VI (BS-VI) with Worldwide Harmonised Light Duty Test
Procedure (WLTP) test cycle (for N1 category): The emission standards for vehicles of category N1,
manufactured on or after 01st April 2028, for all models, shall be as under.
TABLE 1
Exhaust Emission Limits for Vehicles Fitted with PI and CI Internal Combustion Engines
+----------+-------+-------------------------+-----------------+-----------------+-----------------+-----------------+-----------------+-----------------+-----------------+
| Category | Class | Reference Mass (RM)(2) | Mass of carbon | Mass of total | Mass of | Mass of | Combined mass | Mass | Number of |
| | | (kg) | monoxide (CO) | hydrocarbons | nonmethane | nitrogen oxides | of total | particulate | particles |
| | | | (mg/km) | (THC) (mg/km) | hydrocarbons | (NOx) (mg/km) | hydrocarbons | matter (PM) | (PN) |
| | | | | | (NMHC) (mg/km) | | and oxides of | (mg/km) | (#/km) |
| | | |-----+-----|-----+-----|-----+-----|-----+-----| nitrogen | | |
| | | | PI | CI | PI | CI | PI | CI | PI | CI | (THC + NOx) | PI(1) | CI | PI(1) | CI |
| | | | | | | | | | | | (mg/km) | | | | |
+==========+=======+=========================+=====+=====+=====+=====+=====+=====+=====+=====+=================+=======+=====+=======+=====+
| (1) | I | RM ≤ 1305 | 1000| 500 | 100 | 68 | - | - | 60 | 80 | - | 170 | 4.5 | 4.5 | 6x10^11 | 6x10^11 |
+----------+-------+-------------------------+-----+-----+-----+-----+-----+-----+-----+-----+-----------------+-------+-----+---------+-----+
| (2) N1 | II | 1305 < RM ≤ 1760 | 1810| 630 | 130 | 90 | - | - | 75 | 105 | - | 195 | 4.5 | 4.5 | 6x10^11 | 6x10^11 |
+----------+-------+-------------------------+-----+-----+-----+-----+-----+-----+-----+-----+-----------------+-------+-----+---------+-----+
| (3) | III | 1760 < RM 2270 | 740 | 160 | - | 108 | - | - | 82 | 125 | - | 215 | 4.5 | 4.5 | 6x10^11 | 6x10^11 |
+----------+-------+-------------------------+-----+-----+-----+-----+-----+-----+-----+-----+-----------------+-------+-----+---------+-----+
PI = Positive Ignition, CI = Compression Ignition
1. For Positive Ignition, Particulate mass and number of particles limit shall apply only to vehicles with
Direct Injection Engines.
2. "Reference mass" means the vehicle's mass in running order plus 75 kg
For vehicles of category N2 between 3.5 and 5.0 tonnes maximum mass, originating from a type of vehicle
of category N1, the approval authority may grant an emission type-approval if the N2 vehicle meets the
emission requirements for a type of vehicle of category N1. Such N2 vehicles will be required to meet
COP/ISC/IUPR requirements under this rule.
Application of Test Requirements for Type-Approval – BS VI, with WLTP test procedures, shall be the same
as that of Table 2 of rule 115 (18) (i), including explanatory note (1) to (5) only.
Notes. -
1. The test shall be on a Chassis Dynamometer.
2. The test procedure, including driving cycle, shall be as provided in AIS-175, as amended from time
to time.
3. There shall be no relaxation of norms for Conformity of Production (COP) purposes, and the
procedure for compliance shall be as per AIS-175, as amended from time to time.
4. Specifications for Reference Fuels shall be as follows:—
(a) Reference natural gas fuel used in Natural Gas or Bio-Methane mono-fuel or bi-fuel vehicles shall be as
per Annexure IV-L (G20, G23 and G25).
(b) Reference LPG fuel used in LPG mono fuel or bi-fuel vehicles shall be as per Annexure IV-M (Fuel A
and Fuel B), However, in case of non-availability of reference fuels for CNG or LPG, the commercially
available CNG as per BIS 15958:2012 and LPG as per BIS 14681:2000 as amended from time to time shall
be used for the purpose of Type approval and conformity of production.
(c) The reference ethanol fuel (E85) shall be as per Annexure IV-Q.
(d) The reference Diesel fuel (B7) shall be as specified in Annexure IV-T.
(e) The reference fuel Biogas (Bio-methane) shall be as per IS 16087:2013 and as amended from time to
time.
(f) The reference fuel Hydrogen Enriched Compressed Natural Gas (HCNG) shall be as per IS 17314:2019
and as amended from time to time.
(g) Hydrogen Fuel vehicles shall be tested with reference fuel specified in Annexure IV-W to said rules.
(h) The reference fuel Hydrogen Enriched Compressed Natural Gas (HCNG) shall be as per IS 17314:2019
and as amended from time to time.
(i) In case of non-availability of E100 reference fuel, the commercially available E100 fuel as per
IS17821:2022 as amended from time to time shall be used for the purpose of Type approval and conformity
of production.
(j) The reference E20 fuel (20 per cent. of Ethanol in Gasoline) shall be as per IS 17943:2022 and as amended
from time to time by BIS.
(k) The reference B100 fuel shall be as per Annexure IV-S and as amended from time to time by BIS.
5. Crankcase ventilation system shall not permit the emission of any of the crankcase gases into the
atmosphere.
6. Evaporative emission shall not be more than 2.0 g/test from gasoline-fuelled vehicles. The
evaporative emission test procedure for gasoline-fuelled vehicles shall be as per the procedure
specified in AIS 175, and as amended from time to time.
7. The Conformity of Production (COP) testing procedure shall be as described in AIS 175 and as
amended from time to time.
8. Conformity of production (CoP) frequency and samples as under, namely:—
(i) the conformity of production period for each vehicle model, including its variants shall be once a year;
(ii) where production volume in six months is less than 250 per model, including its variants, the provisions
contained in the provisions of rule 126-A shall apply;
(iii) all these tests shall be conducted with the reference fuel as specified in this sub-rule:
Provided that, at the manufacturer's request, the test may be carried out with commercial fuel;
(iv) for vehicles approved as per this sub-rule, at least 50 per cent of vehicle models, rounded to the nearest
integer value, produced from a particular plant per year shall be selected randomly from the dealer's location
or warehouse.
9. Specifications for Commercial Fuels are as follows:—
(i) the commercial Gasoline fuel shall be as per Annexure IV-U and as amended from time to time;
(ii) specifications for commercial CNG and commercial LPG shall be in accordance with BIS 15958:2012
and as per BIS 14681:2000 respectively and as amended from time to time;
(iii) Biodiesel used in commercial diesel shall be as per IS 15607 as amended from time to time;
(iv) specifications for commercial diesel fuel shall be as per Annexure IV-V and as amended from time to
time;
(v) specification for commercial fuel E85 (blend of 85 per cent of Ethanol in Gasoline) shall be as per IS
16634:2017 and as amended from time to time by BIS;
(vi) specifications for commercial Biogas (Bio-Methane) shall be as per IS:16087:2013 and as amended from
time to time;
(vii) specifications for Hydrogen Enriched Compressed Natural Gas (HCNG) shall be as per IS 17314:2019
and as amended from time to time;
(viii) Specification for commercial ethanol fuel (E20) shall be as per IS 17021:2018;
(ix) Specification for commercial fuel E100 shall be as per IS 17821:2022 and as amended from time to
time
10. Specifications of NOx reduction agent AUS 32 (Aqueous Urea Solution) shall be same as that of
Note 10 of Rule 115 (18) (i).
11. For Diesel vehicles, the requirements for the emission of visible pollutants (smoke) shall be same as
that of Note 11 of Rule 115 (18) (i).
12. The engine power shall be measured on engine dynamometer and the procedure and requirements
for the measured power shall conform to AIS 137, as amended from time to time.
13. Type II Test: Vehicles fitted with PI engines specified in this sub-clause shall comply with the
provisions of clause (i) of sub-rule (2) of rule 115 as applicable.
14. Free Acceleration Smoke: Vehicles fitted with CI engines specified in this sub-clause shall comply
with the provisions of clause (ii) of sub-rule (2) of rule 115 as applicable.
15. Deterioration Factor shall be as given in the following Table: -
Table 2
Deterioration Factor: BS VI – WLTP Test Cycle
+-----+-------------------+--------+--------+--------+--------+-----------+--------------------+-----------------+
| Sl. | Engine | CO | THC | NMHC | NOX | HC+NOX | Particulate Matter | Particle Number |
| No. | Category | | | | | | (PM) | (PN) |
+=====+===================+========+========+========+========+===========+================----+=================+
| | | (3) | (4) | (5) | (6) | (7) | (8) | |
+-----+-------------------+--------+--------+--------+--------+-----------+--------------------+-----------------+
| (1) | Positive Ignition | 1.5 | 1.3 | 1.3 | 1.6 | 1.0 | 1.0 | 1.0 |
+-----+-------------------+--------+--------+--------+--------+-----------+--------------------+-----------------+
| (2) | Compression | 1.5 | - | - | 1.1 | 1.1 | 1.0 | 1.0 |
| | Ignition | | | | | | | |
+-----+-------------------+--------+--------+--------+--------+-----------+--------------------+-----------------+
i. Alternatively, for PI vehicles, the vehicle manufacturer may opt for a vehicle ageing test of 1,60,000
km or a bench ageing durability test, for evaluating the Deterioration factor as per AIS 175 and as
amended from time to time.
ii. This test may be performed by driving vehicle on a test track, on the road, or on a chassis
dynamometer or Engine Test Bench as per AIS 175 and as amended from time to time
iii. The above ageing test should be carried out by the approved test agency specified in rule 126.
16. The vehicles shall be equipped with On-Board Diagnostic (BS VI WLTP- OBD) systems for
emission control which shall have the capability of identifying the likely area of malfunction by
means of fault codes stored in computer memory as per the procedure laid down in AIS-175 and as
amended from time to time when that failure results in an increase in emission above the limits given
in the following Table, namely:-
Table 3:
On Board Diagnostic (OBD) Threshold for BS-VI vehicles
+-----+----------+-------+-------------------------+-----------------+-----------------+-----------------+-----------------+
| Sl. | Category | Class | Reference mass (RM)(2) | CO (mg/km) | NMHC/NOx (mg/km)| NOx (mg/km) | PM (mg/km) |
| No. | | | (kg) |-----------+-----|-----------+-----|-----------+-----|-----------+-----|
| | | | | PI | CI | PI | CI | PI | CI | PI(1)| CI |
+=====+==========+=======+=========================+=====+=====+=====+=====+=====+=====+=====+======+====+
| | | | | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) |
+-----+----------+-------+-------------------------+-----+-----+-----+-----+-----+-----+-----+-----+-----+
| (1) | | I | RM < 1305 | 1900| 1750| 170 | 290 | 90 | 140 | 12 | 12 |
+-----+----------+-------+-------------------------+-----+-----+-----+-----+-----+-----+-----+-----+-----+
| (2) | N1 | II | 1305 < RM ≤ 1760 | 3400| 2200| 225 | 320 | 110 | 180 | 12 | 12 |
+-----+----------+-------+-------------------------+-----+-----+-----+-----+-----+-----+-----+-----+-----+
| (3) | | III | 1760 < RM | 4300| 2500| 270 | 350 | 120 | 220 | 12 | 12 |
+-----+----------+-------+-------------------------+-----+-----+-----+-----+-----+-----+-----+-----+-----+
1. For positive ignition, particulate mass applies only to vehicles with direct injection
engines
2. Reference Mass shall be considered as Mass in Running Order +75kg.
17. In-use performance ratio (IUPR) for BS VI vehicles complying to these rules, the in-use performance
ratio (IUPR) of a specific monitor M of the OBD systems shall be:
IUPRM = Numerator/ Denominator
i. Comparison of Numerator and Denominator indicates how often a specific monitor is operating
relative to vehicle operation. Detailed requirements for tracking IUPR are given in AIS 175.
ii. If, according to the requirements specified in AIS 175, the vehicle is equipped with a specific monitor
M, IUPRM shall be greater or equal to the following minimum values.
a. 0.520 for evaporative emission purge control monitors.
b. 0.336 for all other monitors.
c. 0.260 for secondary air system monitors and other cold start-related monitors.
iii. In service compliance of vehicles shall be as per the procedure laid down in AIS175 and as amended
from time to time.
iv. For the vehicles complying with these Rules, real-world driving cycle emission measurement using
PEMS shall be carried out for vehicles as per the procedure laid down in AIS 175 as amended from
time to time, for all models during Type Approval. The RDE Conformity Factor (CF), shall be as per
the following Table, namely:-
Table 4
Conformity Factor (CF) : BS VI-WLTP
+--------+------------+--------------------------------+
| Sl. No.| Pollutant | CFpollutant |
+========+============+================================+
| | (1) | (2) |
+--------+------------+--------------------------------+
| (1) | NOx | 1 + margin (3) NOx |
| | | With margin NOx = 0.43 |
+--------+------------+--------------------------------+
| (2) | PN (1) | 1 + margin (3) PN |
| | | With margin PN = 0.5 |
+--------+------------+--------------------------------+
| (3) | CO (2) | |
+--------+------------+--------------------------------+
1. Applicable for: Positive Ignition (Direct Injection) engines and Compression Ignition Engines only
2. CO emissions shall be measured and recorded at RDE tests.
3. Margin is a parameter taking into account considering the additional measurement uncertainties
introduced by the PEMS equipment.
20. The CNG or Bio-CNG or HCNG Vehicles shall meet all the safety requirements as per AIS 024,
AIS-028 Revision 1 as applicable.
21. The compatibility of the vehicle to the level of Ethanol blend of E85 and E100 shall be defined by
the vehicle manufacturer, and the same shall be displayed on the vehicle by putting a clearly visible
sticker as per AIS 171:2021.
22. All the gasoline-fuelled mono-fuel and Bi-Fuel Vehicles with Positive Ignition Engines, including
Hybrids, shall be certified with Ethanol (E20) fuel."
[F. No. RT-11036/25/2025-MVL]
MAHMOOD AHMED, Addl. Secy.
Note: The principal rules were published in the Gazette of India, Extraordinary, Part II, Section 3,
sub-section(i) vide G.S.R. 590(E), dated the 2nd June, 1989 and lastly amended vide G.S.R. .....(E) dated
the
Login to read full text