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REGD. No. D. L.-33004/99
The Gazette of India
CG-DL-E-02072026-273991
EXTRAORDINARY
PART II—Section 3—Sub-section (i)
PUBLISHED BY AUTHORITY
No. 484]
NEW DELHI, WEDNESDAY, JULY 1, 2026/ASHADHA 10, 1948
MINISTRY OF ROAD TRANSPORT AND HIGHWAYS
NOTIFICATION
New Delhi, the 30th June, 2026
G.S.R. 542(E). - Whereas, the draft rules further to amend the Central Motor Vehicles Rules, 1989 were published, as required under sub-section (1) of section 212 of the Motor Vehicles Act, 1988 (59 of 1988), vide notification of the Government of India in the Ministry of Road Transport and Highways vide number G.S.R 151 (E), dated the 27th February, 2026, in the Gazette of India, Extraordinary, Part II, Section (3), sub-section (i), inviting objections and suggestions from all persons likely to be affected thereby before the expiry of the period of thirty days from the date on which copies of the Gazette containing the said notification were made available to the public;
And whereas the copies of the said Gazette notification were made available to the public on the 28th February,2026;
And whereas the objections and suggestions received from the public in respect of the said draft rules have been considered by the Central Government;
Now, therefore, in exercise of the powers conferred by section 110 of the Motor Vehicles Act, 1988 (59 of 1988), the Central Government hereby makes the following rules further to amend the Central Motor Vehicles Rules, 1989, namely:-
1. Short title and commencement. — (1) These rules may be called as the Central Motor Vehicles (Eleventh 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.
2. In the Central Motor Vehicle Rules, 1989 (hereinafter referred to as the said rules), rule 115 A,
(i) for the marginal heading, the following shall be substituted, namely:-
"115 A. Emission of smoke and vapour from agricultural tractors, power tillers, construction equipment vehicles and combined harvesters driven by internal combustion engines."
(ii) for sub rule (9), the following shall be substituted, namely:
"(9) Every agricultural tractor, power tiller and combined harvester shall be so manufactured that it complies with the following standards of gaseous pollutants emitted by them when tested on the following duty cycle, namely:-
a. for variable-speed engines, the 8-mode test cycle or the corresponding ramped modal cycle and the transient cycle Non-Road Transient Cycle (NRTC) if applicable;
b. for constant-speed engines, the 5-mode test cycle or the corresponding ramped modal cycle;
c. emissions (g/kWh) shall be measured over applicable emission limit for Non-Road Steady Cycle (NRSC) and Non-Road Transient Cycle (NRTC) test cycle as per test applicability mentioned in Table 1, Table 2 and Table 2A given below and for NRTC test cycle, composite weighted emissions shall be computed by weighing the cold start results 10 per cent. and the hot start results 90 per cent. weighted composite results shall meet the limits given in said- tables
Table 1
(TREM Stage – IV)
Applicable emission limit for Non-Road Steady Cycle (NRSC) and Non-Road Transient Cycle (NRTC) test cycle
+--------------+-----------------------+----------+----------------+-------+----------+----------------+
| Category, kW | Applicable with effect from | CO (1) | HC (1) | NOx | PM (1) | Test Cycle* |
+==============+=======================+==========+================+=======+==========+================+
| | | | g/kWh | | | |
+--------------+-----------------------+----------+----------------+-------+----------+----------------+
| 37 <P< 56 | | 5.0 | 4.7 (HC+NOx) | | 0.025(2) | |
+--------------+-----------------------+----------+----------------+-------+----------+----------------+
| 56 <P<130 | 01-01-2023 | 5.0 | 0.19 | 0.4 | 0.025 | NRSC and NRTC |
+--------------+-----------------------+----------+----------------+-------+----------+----------------+
| 130<P<560 | | 3.5 | 0.19 | 0.4 | 0.025 | |
+--------------+-----------------------+----------+----------------+-------+----------+----------------+
* In case of a vehicle equipped with a Compression ignition (CI) engine, the gaseous and particulate emissions shall be measured over the NRSC/NRTC test cycle. In case of a vehicle equipped with a Positive Ignition (PI) engine, gaseous and particulate emissions shall be measured over the NRTC test cycle as described in AIS-137-Part 7 and as amended from time to time.
(1) Not applicable for engine fuelled with Hydrogen. In case of engines where HC+NOx limits are specified, the limit shall be only on NOx emissions.
(2) Applicable for CI engines only
Table 2
(TREM Stage -IIIAA/IV/V)
Applicable emission limit for Non-Road Steady Cycle (NRSC) and Non-Road Transient Cycle (NRTC) test cycle if applicable.
+--------------+-----------------------+-------------+----------+----------------+--------+---------+-------------+----------------+
| Category, kW | Applicable with effect from | TREM | CO (1) | HC (1) (4) | NOx | PM | PN #/kWh | Test cycle* |
+==============+=======================+=============+==========+================+========+=========+=============+================+
| | | | | g/kWh | | | | |
+--------------+-----------------------+-------------+----------+----------------+--------+---------+-------------+----------------+
| P<8 | 01-10-2026 | TREM V | 8.0 | 7.5 (HC+NOx) | 0.4 | | | NRSC or NRTC (3) |
+--------------+-----------------------+-------------+----------+----------------+--------+---------+-------------+----------------+
| 8<P<19 | 01-10-2026 | TREM V | 6.6 | 7.5 (HC+NOx) | 0.4 | | | |
+--------------+-----------------------+-------------+----------+----------------+--------+---------+-------------+----------------+
| 19 <P<37 | 01-04-2010 | TREM IIIA** | 5.0 | 7.5 (HC+NOx) | 0.6 | | | NRSC or NRTC (3) |
+--------------+-----------------------+-------------+----------+----------------+--------+---------+-------------+----------------+
| 19 <P< 37 | 01-04-2028 | TREM IIIAA | 5.0 | 4.7(HC+NOx) | 0.35(2)| | | NRSC or NRTC (3) |
+--------------+-----------------------+-------------+----------+----------------+--------+---------+-------------+----------------+
| 37 <P< 56 | 01-01-2023 | TREM IV | 5.0 | 4.7 (HC+NOx) | 0.025(2)| | | |
+--------------+-----------------------+-------------+----------+----------------+--------+---------+-------------+----------------+
| 56 <P<130 | 01-10-2026 | TREM V | 5.0 | 0.19 | 0.4 | 0.015 | 1×10^12^ | NRSC and NRTC |
+--------------+-----------------------+-------------+----------+----------------+--------+---------+-------------+----------------+
| 130 <P< 560 | 01-10-2026 | TREM V | 3.5 | 0.19 | 0.4 | 0.015 | 1×10^12^ | |
+--------------+-----------------------+-------------+----------+----------------+--------+---------+-------------+----------------+
| P≥ 560 | 01-10-2026 | TREM V | 3.5 | 0.19 | 3.5 | 0.045 | | NRSC |
+--------------+-----------------------+-------------+----------+----------------+--------+---------+-------------+----------------+
* In case of vehicle equipped with Compression ignition (CI) engine, the gaseous and particulate emission shall be measured over NRSC and NRTC test cycle. In case of vehicle equipped with Positive ignition (PI) engine, gaseous and particulate emission shall be measured over NRTC test cycle as described in AIS-137-Part 7 and as amended from time to time.
** For PI engines NRTC test cycle and emission calculation shall be applicable as per AIS-137 Part 7. All other requirement for TREM-IIIA shall be applicable as per procedure laid down in TAP-115/116 Part XV Sub-Part A.
(1) Not applicable for engine fuelled with Hydrogen. In case of engines where HC+NOx limits are specified, for Hydrogen IC engines, the limit shall be only on NOx emissions.
(2) Applicable for CI engines only
(3) NRSC (ISO-8178 C1 mode) is applicable for CI engines and is NRTC applicable for PI engines only
(4) Specific provisions on total hydrocarbon (HC) limits for fully and partially gaseous-fuelled engines as per AIS-137 Part 7:
A = 1.1 for engine power <560 kW and A= 6.0 for engine power >=560
Table 2A
(TREM Stage -V)
Applicable emission limit for Non-Road Steady Cycle (NRSC) and Non-Road Transient Cycle (NRTC) test cycle if applicable
+--------------+-----------------------+-------------+----------------+--------+---------+-------------+----------------+
| Category, kW | Applicable with effect from | CO(1) | HC(1)(3) | NOx | PM | PN #/kWh | Test cycle* |
+==============+=======================+=============+================+========+=========+=============+================+
| | | | g/kWh | | | | |
+--------------+-----------------------+-------------+----------------+--------+---------+-------------+----------------+
| P<8 | 01-10-2026 | 8.0 | 7.5 (HC+NOx) | 0.4 | | | NRSC or NRTC(2)|
+--------------+-----------------------+-------------+----------------+--------+---------+-------------+----------------+
| 8 <P<19 | 01-10-2026 | 6.6 | 7.5 (HC+NOx) | 0.4 | | | |
+--------------+-----------------------+-------------+----------------+--------+---------+-------------+----------------+
| 19 <P< 37 | 01-04-2032 | 5.0 | 4.7(HC+NOx) | 0.015 | 1×10^12^| | NRSC and NRTC |
+--------------+-----------------------+-------------+----------------+--------+---------+-------------+----------------+
| 37 <P< 56 | 01-04-2032 | 5.0 | 4.7 (HC+NOx) | 0.015 | 1×10^12^| | |
+--------------+-----------------------+-------------+----------------+--------+---------+-------------+----------------+
| 56 <P< 130 | 01-10-2026 | 5.0 | 0.19 | 0.4 | 0.015 | 1×10^12^ | |
+--------------+-----------------------+-------------+----------------+--------+---------+-------------+----------------+
| 130 <P< 560 | 01-10-2026 | 3.5 | 0.19 | 0.4 | 0.015 | 1×10^12^ | |
+--------------+-----------------------+-------------+----------------+--------+---------+-------------+----------------+
| P≥ 560 | 01-10-2026 | 3.5 | 0.19 | 3.5 | 0.045 | | NRSC |
+--------------+-----------------------+-------------+----------------+--------+---------+-------------+----------------+
* In case of vehicle equipped with Compression ignition (CI) engine, the gaseous and particulate emission shall be measured over NRSC and NRTC test cycle. In case of vehicle equipped with Positive ignition (PI) engine, gaseous and particulate emission shall be measured over NRTC test cycle as described in AIS-137-Part 7 and as amended from time to time.
(1) Not applicable for engine fuelled with Hydrogen. In case of engines where HC+NOx limits are specified, for Hydrogen IC engines, the limit shall be only on NOx emissions.
(2) NRSC is applicable for CI engines and NRTC is applicable for PI engines only
(3) Specific provisions on total hydrocarbon (HC) limits for fully and partially gaseous-fuelled engines as per AIS-137 Part 7:
A = 1.1 for engine power <560 kW and A= 6.0 for engine power >=560
Notes:-
(i)The test shall be done on engine dynamometer
(ii) The test procedure for measurement of gross power (without Fan) shall be as per procedure laid down in AIS: 137 and as amended from time to time.
(iii) For gross power measurement the tolerance shall be applied for type approval and conformity of production as per table 3 given below –
Table 3
Power measurement tolerance for engines equipped with electronically controlled fuel injection system for type approval and conformity of production
+-----------------------+-------------------+-----------------------------------+-----------------------------+
| Engine Type | Rated power [%] | Other measurement points on the | Tolerance for engine speed [%] |
| | | curve [%] | |
+=======================+===================+===================================+=============================+
| Type approval | ±2 | ±4 | ±1.5 |
+-----------------------+-------------------+-----------------------------------+-----------------------------+
| Conformity of | ±5 | ±10 | ±5 |
| production | | | |
+-----------------------+-------------------+-----------------------------------+-----------------------------+
Table 3A
Power measurement tolerance for engines equipped with mechanical fuel injection system for type approval and conformity of production
+-----------------------+-----------------+-----------------+-----------------+-----------------+
| Engine Type | Rated power | | Other measurement points | |
+=======================+=================+=================+=================+=================+
| | Single cylinder | Other Engines | Single cylinder | Other Engines |
+-----------------------+-----------------+-----------------+-----------------+-----------------+
| Type approval | ±5 | ±5 | ±10 | ±5 |
+-----------------------+-----------------+-----------------+-----------------+-----------------+
| Conformity of | ±10 | -5/+8 | NA | -5/+8 |
| production | | | | |
+-----------------------+-----------------+-----------------+-----------------+-----------------+
(iv) Test procedure for measurement of emission of visible and gaseous pollutant and particulate matter shall be as per procedure laid down in AIS: 137 and as amended from time to time.
(v) The emission of visible pollutant (smoke) for engines other than P.I. engines shall not exceed the limit values of smoke density when expressed as light absorption coefficients as given in Annexure -I of sub-rule (9) of rule 115, when tested on engine dynamometer at full load at six speeds as per procedure laid down in AIS137 and as amended from time to time
(vi) (a) Engine manufacture may opt for an engine test as mentioned in table 4 given below for evaluating deterioration factors as per procedure laid down in AIS:137 and as amended from time to time-
Table 4
+--------------------------+---------------------------------+
| Category (Power Band) | Emission Durability period (hours) |
+==========================+=================================+
| 0 <P<19 (variable speed) | 3000 |
+--------------------------+---------------------------------+
| 0<P<37 (Constant speed) | |
+--------------------------+---------------------------------+
| 19 <P<37 (Variable speed) | 5000 |
+--------------------------+---------------------------------+
| 37<P>560 all | 8000 |
+--------------------------+---------------------------------+
(b) As an alternative to use a service accumulation schedule to determine deterioration factors, engine manufacturers (except power tillers) may select to use the assigned multiplicative deterioration factors as laid down in AIS:137 and as amended from time to time.
For power tillers, engine manufacturers may select to use the assigned multiplicative deterioration factors as per table 5 given below
Table 5
+--------+--------+--------+--------+
| CO | HC | NOx | PM |
+========+========+========+========+
| 1.1 | 1.05 | 1.05 | 1.1 |
+--------+--------+--------+--------+
(vii) Conformity of Production (COP)frequency and selection procedure shall be as per procedure laid down in AIS: 137 and as amended from time to time.
(viii) For Conformity of Production (COP), -
a. for agricultural tractor and combine harvester with annual production or import up to 200 nos (per engine family), it shall be once in two years per family or model.
b. for agricultural tractor and combine harvester equipment with annual production or import exceeding 200 nos (per engine family), it shall be once in every year per family or model.
(ix) For Conformity of Production (COP), the sampling size shall be one day's average Production subject to a minimum of 10 and maximum of 100:
Provided that for engine family produced less than 200 in the yearly period sample size may be one.
(x) The limits as mentioned in Table 1 2A and 2 shall be applicable for engines fuelled by following fuels: CNG, Bio-CNG, Bio-Gas, LNG, LPG, HCNG, Diesel (B7), Blends of Ethanol with Gasoline, Ethanol (ED 95), Flex-Fuel, Blend of Iso-butanol with Diesel, Bio-diesel blends up to 100%, hydrogen and dual fuelled engines driven by Diesel and any fuel out of CNG, Bio-CNG or LNG.
For type approval and conformity of production, the test fuel shall be reference fuel or commercial fuel as specified below:
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).
c. However, in case of non-availability of reference fuels for CNG / LPG, the commercially available CNG as per BIS 15958: 2012 and LPG as per BIS 14861:2000, as amended from time to time, shall be used for the purpose of Type Approval and Conformity of Production.
d. The Reference Ethanol fuel (ED95) shall be as specified in Annexure IV-R.
e. The Reference Diesel fuel (B7) or Commercial Diesel fuel shall be as specified in Annexure IV–T or Annexure IV-V respectively.
f. The reference fuel Biogas (Bio-methane) shall be as per IS 16087:2013, as amended time to time.
g. In case of LNG, fuel shall comply with the requirements as provided in Annexure IV- LA
h. The vehicle/ engine fuelled with biodiesel blends up to 7% shall be tested with reference diesel (B7) or commercial fuel. Vehicles fuelled with biodiesel blends above 7%, shall be tested with respective blends. Biodiesel used in blends shall be as per IS 15607 as amended from time to time and the diesel used for blends shall be as specified in Annexure IV–T or Annexure IV-V respectively.
i. The reference Hydrogen Fuel shall be as specified in the Annexure IV-W.
j. The HCNG fuel shall be as specified in Annexure IV- ZE (IS:17314: 2019).
(xi) The vehicles specified in this rule fitted with engines, which rely on the use of Catalytic converter and / or electronic EGR and/or a reagent in order to reduce emissions, shall ensure the correct operation of NOx control measures, as per procedure laid down in AIS:137 and as amended from time to time;
(xii) Emission of ammonia over the NRTC and NRSC for engines equipped with SCR shall not exceed a mean value of 25 ppm for engine power category less than or equal to 56 kW for CEV Stage-IV and 10 ppm for engine power category above 56 kW for CEV Stage-IV.
Emission of ammonia over the NRTC and NRSC for engines equipped with SCR shall not exceed a mean value of 10 ppm for CEV Stage-V.
(xiii) The diesel engine NOx reduction agent AUS: 32 (Aqueous Urea Solution) shall conform to part 1 and part 2 of ISO: 22241 or IS 17042;
(xiv) The vehicles specified under this rule with power categories less than 19kW and above 56 kW and manufactured after the 1st October 2026 shall be monitored for gaseous pollutant emission from in-service internal combustion engines installed on vehicles, as per procedure laid down in AIS: 137 and as amended from time to time;
The vehicles specified under this rule with power categories 19 kW to 56 kW and manufactured after the 1st April 2028 shall be monitored for gaseous pollutant emission from in-service internal combustion engines installed on vehicles, as per procedure laid down in AIS: 137 and as amended from time to time;
(xv) The TREM Stage-IV and TREM Stage-V engine or vehicle fitted with engines shall be affixed with a conformance label meeting the requirements as specified in AIS: 137 and as amended from time to time;
(xvi) For the vehicles specified under this rule equipped with electronically controlled fuel injection system, the emission sampled within the control area as per procedure laid down in AIS-137 and as amended from time to time, shall not exceed more than two times the limit values of the emission specified in Table 1, Table 2 and Table 2A respectively;
(xvii) Test procedure and safety guidelines for dedicated CNG / Bio-CNG / LNG/LPG and dual fuel CNG or Bio-CNG or LNG vehicles, kit component including installation thereof shall be as per AIS 024, AIS 028 (Rev.1) as amended from time to time, till such time as corresponding BIS specifications are notified under the Bureau of Indian Standard (BIS) Act,2016 (11 of 2016).
(xviii) Test procedure and safety guidelines for Hydrogen fuelled IC engines / vehicles, kit component including installation thereof shall be as per AIS 195A, as amended from time to time, till such time as corresponding BIS specifications are notified under the Bureau of Indian Standard (BIS) Act, 2016 (11 of 2016)
Provided that the vehicles manufactured before the date of applicability of CEV Stage-IV and CEV Stage-V shall be registered up to eight months and six months respectively, after the respective date of implementation of this rule."
(iii) After Annexure IV-ZD, the following Annexure shall be inserted, namely:-
ANNEXURE IV-ZE
[See rule 115 A (9) and (10)]
Hydrogen Enriched Compressed Natural Gas (HCNG) - Specification
+--------+-----------------------------------+----------------+--------------------+
| Sr. No.| Characteristic (2) | Requirement (3)| Test Method (4) |
| (1) | | | |
+========+===================================+================+====================+
| i) | Hydrogen (percent volume) | 18.0±1.0 | IS 15130 (Part 3) |
+--------+-----------------------------------+----------------+--------------------+
| ii) | Methane (percent volume), Min | 72.0 | |
+--------+-----------------------------------+----------------+--------------------+
| iii) | Other Hydrocarbons (percent volume)| | |
+--------+-----------------------------------+----------------+--------------------+
| | a) Ethane, Max | 6.0 | IS 15130 (Part 3) |
+--------+-----------------------------------+----------------+--------------------+
| | b) C3 and higher HC, Max | 3.0 | |
+--------+-----------------------------------+----------------+--------------------+
| | c) C6 and higher HC, Max | 0.5 | |
+--------+-----------------------------------+----------------+--------------------+
| | d) Total unsaturated HC, Max | 0.5 | |
+--------+-----------------------------------+----------------+--------------------+
| iv) | Impurities | | |
+--------+-----------------------------------+----------------+--------------------+
| | Water content, mg/m3, Max | 5.0 | IS 15641 (Part 2) |
+--------+-----------------------------------+----------------+--------------------+
| | Total sulphurl), mg/m3, Max | 2.0 | ASTM D3246 |
+--------+-----------------------------------+----------------+--------------------+
| | Oxygen, percent volume, Max | 0.5 | IS 15130 (Part 3) |
+--------+-----------------------------------+----------------+--------------------+
| | Carbon dioxide and Nitrogen, percent volume, Max | 3.5 | IS 15130 (Part 3) |
+--------+-----------------------------------+----------------+--------------------+
| | Carbon monoxide, percent mole, Max| 0.1 | IS 15130 (Part 3) |
+--------+-----------------------------------+----------------+--------------------+
Total sulphur includes the sulphur content of odorant
[F. No. RT-11028/22/2016-MV]
MAHMOOD AHMED, Addl. Secy.
Note: The principal rules were published in the Gazette of India, Extraordinary, Part-II, Section 3, Sub-section (i), vide notification number G.S.R. 889(E), dated the 16th September, 2020 and lastly amended vide Notification number G.S.R. 458 (E) dated 8th June, 2026.
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