. /.  WORLD TRADE  
ORGANIZATION   
G/TBT/N/MEX/239 
19 July 2012 
 (12-3956) 
Committee on Technical Barriers to Trade Original: Spanish 
  
 
NOTIFICATION 
 
The following notification is being circ ulated 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 and e-mail 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 Normalizaci ón de Medio Ambiente y Recursos Naturales  
(National Advisory Committee on Standardi zation for the Environment and Natural 
Resources) Blvr. Adolfo Ruiz Cortines número 4209, 4o. piso, Ala "B" Fraccionamiento Jardines en la Montaña, Delegación Tlalpan 
México, D.F., código postal 14210 
E-mail: sylvia.trevino@semarnat.gob.mx  
Website: http://www.semarnat.gob.mx  
3. Notified under Article 2.9.2 [X], 2.10 .1 [ ], 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):   New vehicles - carbon 
dioxide emissions (HS 8702, 8703 and 8704) 
5. Title, number of pages and language(s) of the notified document:   Proyecto de Norma 
Oficial Mexicana PROY-NOM-163-SEMARNAT-EN ER-SCFI-2012, Emisiones de bióxido 
de carbono (CO 2) provenientes del escape y su equivalencia en términos de 
rendimiento de combustible, aplicable a vehículos automotores nuevos de peso 
bruto vehicular de has ta 3,857 kilogramos  (Draft Mexican Official Standard 
PROY-NOM-163-SEMARNAT-ENER-SCFI-2012, Carbon dioxide (CO 2) emissions from 
exhaust pipes and their equivale nce in terms of fuel performance, applicable to new motor 
vehicles of a gross vehicle weight of up to 3,857 kg) (17 pages, in Spanish) G/TBT/N/MEX/239 
Page 2  
 
  6. Description of content:   The notified draft Standard establishes the parameters and 
methodology for calculating the target and ob served corporate averages for carbon dioxide 
emissions expressed in grams of carbon dioxide per kilometre (g CO
2/km) and their 
equivalence in terms of fuel performance, expressed in kilometres per litre (km/l).  
The Standard is applicable to petrol or di esel fuelled new light motor vehicles of a gross 
vehicle weight not exceeding 3,857 kg, the m odel year of which is from 2014 to 2016 and 
which are marketed in Mexico.  Once published in the Official Journal as a final Standard, 
the text will be binding on all natural and le gal persons, manufacturers  and importers that 
market new light motor vehicles of a gross vehicle weight not exceeding 3,857 kg, except when they market a total of up to 500 units per model year.  
7. Objective and rationale, including the nature of urgent problems where applicable:  
To protect the environment and promote the energy efficiency of vehicles marketed in 
Mexico. 
8. Relevant documents:   -  
9. Proposed date of adoption: 
Proposed date of entry into force:  Not applicable 
60 calendar days after the publication of 
the final Mexican Official Standard in the Official Journal. 
10. Final date for comments:   10 September 2012 
11. Texts available from:  National enquiry  point [X] or address, telephone and fax 
numbers and e-mail and website addresses, if available, of other body: 
Secretaría de Economía 
Subsecretaría de Competitividad y Normatividad Dirección General de Normas Tel.: (+52) 55 5729-9100, Ext. 43217 Fax: (+52) 55 5520-9715 
Website: http://www.economia.gob.mx/comunidad- negocios/normalizacion/catalogo-
mexicano-de-normas  
E-mail: normasomc@economia.gob.mx  and/or jesus.figueroa@economia.gob.mx  
Text available online at: 
http://dof.gob.mx/index.php? year=2012&month=07&day=12  
http://members.wto.org/crnattach ments/2012/tbt/MEX/12_2732_00_s.pdf