G/TBT/N/MEX/312  
14 June 2016  
(16-3232)  Page: 1/3  
Committee on Technical Barriers to Trade  Original: Spanish  
 
  NOTIFICATION 
The following notification is being circulated in accordance with Article 10.6. 
 
1. Notifying Member: MEXICO 
If applicable, name of local governme nt involved (Articles 3.2 and 7.2):  
2. Agency responsible: Secretaría de Medio Ambiente y Recursos Naturales  (Ministry of the 
Environment and Natural Resources) 
Name and address (including telephon e and fax numbers, email and website 
addresses, if available) of agency or authority designated to handle comments 
regarding the notification shall be indicated if different from above:  
Comité Consultivo Nacional de Normalización de Medio Ambiente y Recursos Naturales  
(National Advisory Committee on Standardization for the Environment and Natural Resources) 
Boulevard Adolfo Ruiz Cortines No. 4209 quinto piso 
Ala "A", Col. Jardines En La Montaña Deleg. Tlalpan 
C.P. 14210, México, D.F. 
Tel.: 56 28 06 13 Email: comarnat@semarnat.gob.mx  
Chairman: Cuauhtémoc Ochoa Fernández  
3. Notified under Article 2.9.2 [ ], 2. 10.1 [X], 5.6.2 [ ], 5.7.1 [ ], other:  
4. Products covered (HS or CCCN where applicable, otherwise national tariff 
heading. ICS numbers may be provided  in addition, where applicable): Motor 
vehicles (heading 87.03) 
5. Title, number of pages and lang uage(s) of the notified document: NOM-EM-167-
SEMARNAT-2016, Que establece los niveles de emisión de contaminantes para los 
vehículos automotores que circulan en la Ciud a d  d e  M é x i c o ,  H i d a l g o ,  E s t a d o  d e  M é x i c o ,  
Morelos, Puebla y Tlaxcala; los métodos de prueba para la certificación de dichos niveles y 
las especificaciones de los equipos que se utilicen para dicha certificación, así como las 
especificaciones para los equipos tecnológicos que se utilicen para la medición de emisiones por vía remota y para la realización de dicha medición  (Emergency Mexican 
Official Standard NOM-EM-167-SEMARNAT-2016 establishing pollutant emission levels for 
motor vehicles in Mexico City, Hidalgo, Mexico State, Morelos, Puebla and Tlaxcala; test methods for certifying these levels; specifications for equipment used in the certification process; specifications for the technologi cal equipment used to measure emissions 
remotely; and specifications for measurement taking) (34 pages, in Spanish)  
6. Description of content: The notified Emergency Standard is binding on the following: 
Owners or lawful possessors of motor vehicles powered by gasoline, diesel, liquefied petroleum gas, natural gas or other alternative fuels, including vehicles providing public services at federal or local level or any form of private service regulated by federal or local 
road transport laws; 
Officials from control centres and, where appropriate, vehicle verification units that are 
accredited by the competent authorities of Me xico City, Hidalgo, Mexico State, Morelos, G/TBT/N/MEX/312 
- 2 - 
  Puebla and Tlaxcala or by the Ministry of Communications and Transport; and 
The competent authorities in Mexico City, Hidalgo, Mexico State, Morelos, Puebla and 
Tlaxcala, and the Ministry of Communication s and Transport, within their respective 
spheres of competence. 
It does not apply to vehicles of a gross vehicle weight of less than 400 kg, motorcycles, 
agricultural tractors, or machinery used in the construction and mining industries. 
7. Objective and rationale, including the nature of urgent problems where 
applicable: The notified text seeks to prevent and control air pollution by establishing 
emission levels for all motor vehicles used in Mexico City, Hidalgo, Mexico State, Morelos, Puebla and Tlaxcala, including those providing public services at federal or local level or any form of private service regulated by federal or local road transport laws. It establishes 
the following: 
 Maximum permissible limits for emissions from motor vehicles powered by gasoline, 
liquefied petroleum gas, natural gas or other alternative fuels; 
 Maximum permissible limits for exhaust emissions from diesel-fuelled motor 
vehicles; 
 Maximum permissible limits for emissions of hydrocarbons, carbon monoxide, 
oxygen and nitrogen oxides, the minimum and maximum level of carbon monoxide 
and carbon dioxide taken together and the lambda factor, and limits relating to the light absorption coefficient, particles and the percentage of opacity from the exhaust 
pipes of motor vehicles powered by gasoline and diesel, respectively; 
 Test methods for certifying emissions from motor vehicles in Me xico City, Hidalgo, 
Mexico State, Morelos, Puebla and Tlaxcala; 
 Specifications for the measuring equipment used to apply the test methods provided 
for in this Emergency Mexican Official Standard; and 
 Characteristics of the equipment and procedure for measuring emissions using 
remote detection methods.  
8. Relevant documents:  
 NOM-008-SCFI-2002, Sistema General de Unidades de Medida (Mexican Official 
Standard NOM-008-SCFI-2002: General system  of units of measurement), published 
in the Mexican Official Journal on 27 November 2002. 
 Norma Oficial Mexicana NOM-041-SEMARNAT-2015, Que establece los límites 
máximos permisibles de emisión de gases contaminantes provenientes del escape de 
los vehículos automotores en circulación que usan gasolina como combustible  
(Mexican Official Standard NOM-041-SEMARNAT-2015 establishing the maximum permissible limits for emissions of gaseous pollutants from the exhausts of gasoline-
powered motor vehicles), published in the Mexican Official Journal on 10 June 2015. 
 NOM-042-SEMARNAT-2003, Que establece los límites máximos permisibles de 
emisión de hidrocarburos totales o no metano, monóxido de carbono, óxidos de 
nitrógeno y partículas provenientes del escape de los vehículos automotores nuevos 
cuyo peso bruto vehicular no exceda los 3,857 kilogramos que usan gasolina, gas licuado de petróleo, gas natural y diesel, así como de las emisiones de hidrocarburos 
evaporativos provenientes del sistema de combustible de dichos vehículos  (Mexican 
Official Standard NOM-042-SEMARNAT-2003 establishing the maximum permissible limits for emissions of total or non-methane hydrocarbons, carbon monoxide, nitrogen oxide and particles from the exhaust pipes of new motor vehicles of a gross 
vehicle weight not exceeding 3,857 kg and using gasoline, liquefied petroleum gas, 
natural gas or diesel fuel, as well as for emissions of evaporative hydrocarbons from the fuel systems of such vehicles), published in the Mexican Official Journal on 7 
September 2005. 
 NOM-045-SEMARNAT-2006, Protección ambiental.- Vehículos en circulación que 
usan diesel como combustible.- Límites máximos permisibles de opacidad, 
procedimiento de prueba y características técnicas del equipo de medición  (Mexican G/TBT/N/MEX/312 
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  Official Standard NOM-045-SEMARNAT-2006: Environmental protection. Diesel-
powered road vehicles. Maximum permissi ble opacity levels, test procedure and 
technical characteristics of measuring equipment), published in the Mexican Official 
Journal on 13 September 2007. 
 NOM-047-SEMARNAT-2014, Que establece las características del equipo y el 
procedimiento de medición para la verificación de los límites de emisión de 
contaminantes, provenientes de los vehículos automotores en circulación que usan 
gasolina, gas licuado de petróleo, gas natural u otros combustibles alternos (Mexican 
Official Standard NOM-047-SEMARNAT-2014 establishing the characteristics of the 
equipment and the measuring procedure used to verify levels of pollutant emissions 
from motor vehicles using gasoline, liquefied petroleum gas, natural gas or other alternative fuels), published in the Mexican Official Journal on 26 November 2014. 
 NOM-050-SEMARNAT-1993, Que establece los niveles máximos permisibles de 
emisión de gases contaminantes provenientes del escape de los vehículos automotores en circulación que usan gas licuado de petróleo, gas natural u otros combustibles alternos como combustible  (Mexican Official Standard NOM-050-
SEMARNAT-1993 establishing the maximum permissible levels for emissions of 
gaseous pollutants from the exhausts of motor vehicles powered by liquefied petroleum gas, natural gas or other alternative fuels), published in the Mexican 
Official Journal on 18 October 1993. 
 Coordination Agreement establishing th e Megalópolis Environmental Commission, 
concluded by the Ministry of the Environment and Natural Resources, the 
Government of the Federal District, and the States of Hidalgo, Mexico, Morelos, 
Puebla and Tlaxcala, and published in th e Mexican Official Journal on 3 October 
2013. 
9. Proposed date of adoption: 1 July 2016 
Proposed date of entry into force: 1 July 2016. Will remain in effect for six months 
under Article 48, paragraph 1, of the Federal Law on Metrology and Standardization.  
10. Final date for comments: Not applicable. 
11. Texts available from: National enquiry point [X] or address, telephone and fax 
numbers and email and website addresse s, if available, of other body:  
Secretaría de Economía  (Ministry of the Economy) 
Subsecretaría de Competitividad y Normatividad  (Undersecretariat of Competitiveness and 
Standardization) 
Dirección General de Normas  (General Directorate of Standards) 
Tel.: (+52) 55 5729-9100, Ext. 43244 Fax: (+52) 55 5520-9715 
Website: http://www.economia.gob.mx/comunidad- negocios/normalizacion/catalogo-
mexicano-de-normas  
Email: normasomc@economia.gob.mx  and/or sofia.pacheco@economia.gob.mx  
Available online at: 
http://dof.gob.mx/nota_detalle.php?codigo=5440157&fecha=07/06/2016  
https://members.wto.org/crnattachments/2016/TBT/MEX/16_2299_00_s.pdf