G/TBT/N/MEX/525  
6 July 2023 
(23-4586) Page: 1/2 
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 government 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 telephone 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:  
Secretaría de Medio Ambiente y Recursos Naturales  (Ministry of the Environment and 
Natural Resources)  
Comité Consultivo Nacional de Normalización de Medio Ambiente y Recursos Naturales  
(National Adv isory Committee on Standardization for the Environment and Natural 
Resources)  
Ejército Nacional número 223, Piso 16, Colonia Anáhuac, Alcaldía Miguel Hidalgo, Código 
Postal 11320, Ciudad de México  
Correo electrónico manuel.flores@semarnat.gob.mx  
3. Notified under Article 2.9.2 [X], 2.10.1 [ ], 5.6.2 [X], 5.7.1 [ ], 3.2 [ ], 7.2 [ ], 
other:  
4. Products covered (HS or CCCN where applicable, otherwise national tariff 
heading . ICS numbers may be provided in addition, where applicable) : The 
notified draft Mexican Official Standard seeks to establish the maximum permissible levels 
for emissions of po llutants from the exhausts of motor vehicles powered by gasoline, 
liquefied petroleum gas, natural gas, diesel or any other alternative fuel in Mexico City, 
Hidalgo, Mexico State, Morelos, Puebla, Querétaro and Tlaxcala.  
5. Title, number of pages and lang uage(s) of the notified document : Proyecto de 
Modificación de la Norma Oficial Mexicana NOM -167-SEMARNAT -2017, Que establece los 
límites máximos permisibles de emisión de contaminantes para los vehículos automotores 
que circulan en las entidades federativas Ciudad de México, Hidalgo, Estado de México, 
Morelos, Puebla y Tlaxcala ; los métodos de prueba para la evaluación de dichos límites y 
las especificaciones de tecnologías de información y hologramas, para quedar como 
Proyecto de Norma Oficial Me xicana PROY -NOM-167-SEMARNAT -2023, Que establece los 
límites máximos permisibles de emisión de contaminantes para los vehículos automotores 
que circulan en las entidades federativas Ciudad de México, Hidalgo, Estado de México, 
Morelos, Puebla, Querétaro y Tlaxcala ; los métodos de prueba para la evaluación de 
dichos límites y las especificaciones de tecnologías de información y hologramas  (Draft 
amendment to Mexican Official Standard NOM -167-SEMARNAT -2017 establishing the 
maximum permissible pollutant emissi on levels for motor vehicles in the federal entities 
of Mexico City, Hidalgo, Mexico State, Morelos, Puebla and Tlaxcala ; test methods for 
assessing these levels ; and specifications concerning information technology and 
holograms, which is now entitled dra ft Mexican Official Standard PROY -NOM-167-G/TBT/N/MEX/525  
- 2 - 
  SEMARNAT -2023 establishing the maximum permissible pollutant emission levels for 
motor vehicles in the federal entities of Mexico City, Hidalgo, Mexico State, Morelos, 
Puebla, Querétaro and Tlaxcala ; test methods f or assessing these levels ; and 
specifications concerning information technology and holograms) (19 pages, in Spanish)  
6. Description of content : The notified draft Mexican Official Standard has the following 
objectives:  
To establish the maximum permissibl e levels for emissions of pollutants from the exhausts 
of motor vehicles powered by gasoline, liquefied petroleum gas, natural gas, diesel or any 
other alternative fuel in Mexico City, Hidalgo, Mexico State, Morelos, Puebla, Querétaro 
and Tlaxcala;  
To esta blish the minimum information technology requirements for vehicle inspection 
centres, inspection units, federal government through the Ministry of the Environment 
and Natural Resources, the Ministry of Infrastructure, and the Ministry of Communications 
and Transport, and the governments of the federal entities of Mexico City, Hidalgo, Mexico 
State, Morelos, Puebla, Querétaro and Tlaxcala, within the scope of their respective 
powers;  
To establish minimum requirements governing the authenticity and traceabili ty of vehicle 
inspection records issued at inspections centres and vehicle inspection units applying this 
Mexican Official Standard.  
To establish the test method through the on -board diagnostics system, specifications and 
procedures.  
To establish the maximum permissible pollutant emission limits for the detection of an 
ostensibly polluting motor vehicle that use petrol or diesel.  
7. Objective and rationale, including the nature of urgent problems where 
applicable : Protection of human health or safety ; Protection of the environment ; Cost 
saving and productivity enhancement  
8. Relevant documents:  
The notified Mexican Official Standard is not equivalent (NEQ) to any international 
standard, because no international standard existed at the time of i ts drafting.  
9. Proposed date of adoption : To be determined  
Proposed date of entry into force : To be determined  
10. Final date for comments : 60 days from notification  
11. Texts available from : National enquiry point [ ] or address, telephone and fax 
numbers and email and website addresses, if available, of other body:  
Secretaría de Economía  (Ministry of the Economy)  
Dirección General de Normas  (Directorate -General of Standards)  
Contact person : Diógenes Hernández Chávez  
Pachuca 189, Colonia Condesa,  
Demarcación territorial Cuauhtémoc,  
Ciudad de México, 06140  
Tel.: (+52 55) 5729 91 00, Ext. 13247 or 13217  
Email: diogenes.hernandez@economia.gob.mx  
https://www.dof.gob.mx/nota_detalle.php?codigo=5694213&fecha=04/07/2023  
https://members.wto.org/crnattachments/2023/TBT/MEX/23_10819_00_s.pdf