G/TBT/N/MEX/252  
 
1 March 2013  
(13-1105)  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 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 teleph one 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 diffe rent from above: 
Comité Consultivo Nacional de Normalizació n de Medio Ambiente y Recursos Naturales 
(National Advisory Committee on Standardization 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 provid ed in addition, where applicable):  
New light-duty vehicles - carbon dioxide emissions (HS codes: 8702, 8703, 8704). 
5. Title, number of pages and lang uage(s) of the notified document:  Proyecto de 
Norma Oficial Mexicana PROY-NOM-163-SEMARNAT-ENER-SCFI-2012, Emisiones de bióxido de carbono (CO2) provenientes de l escape y su equivalencia en términos 
de rendimiento de combustible, aplicable a vehículos automotores nuevos 
de peso bruto vehicular de hasta 3,857 kilogramos (Draft Mexican Official 
Standard  PROY-NOM-163-SEMARNAT-ENER-SCFI-2012: Carbon dioxide (CO2) emissions 
from exhaust pipes and their equivalence in terms of fuel performance, applicable to 
new motor vehicles of a gross vehicle weight of up to 3,857 kg) (22 pages, in Spanish). 
6. Description of content: The notified draft Standard establishes the parameters and 
methodology for calculating the target and observed corporate averages for carbon dioxide emissions expressed in grams of ca rbon dioxide per kilometre (g CO2/km) and 
their equivalence in terms of fuel performanc e, expressed in kilometres per litre (km/l). 
The Standard is applicable to petrol or diesel fuelled new light motor vehicles of a gross 
vehicle weight not exceeding 3,857 kg, the model 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 legal 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. G/TBT/N/MEX/252 
 
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  7. Objective and rationale, including the nature of urgent problems where 
applicable:  To protect the environment and human health. 
8. Relevant documents:  
- G/TBT/N/MEX/239; 
- Mexican Official Standard NOM-008-SCFI-2002 - Sistema General de Unidades 
de Medida  (General system of units of measurement), published in 
the Official Journal on 27 November 2002; 
- 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, point 4.4(a), published in the Official Journal on 7 September 2005; 
- Mexican Standard NMX-AA-011-SCFI-1993 - Método de prueba para la evaluación 
de emisiones de compuestos del escape de los vehículos automotores nuevos en planta que usan gasolina como combustible  (Test method for evaluating 
compound emissions from the exhaust pipes of new motor vehicles using 
gasoline as fuel). Notice of entry into force published in the Official Journal on 27 December 1993; 
- Code of Federal Regulations, Volume 40, parts 85, 86 and 600, revised 
on 1 July 1994 by the US Environmental Protection Agency. 
9. Proposed date of adoption: 
Proposed date of entry into 
force:   Not applicable. 
Sixty calendar days after publication of 
the final Mexican Official Standard in the Official Journal. 
10. Final date for comments:  22 April 2013 
11. Texts available from: National enquiry point [X] or address, telephone and fax 
numbers and e-mail and website addresse s, 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 E-mail: normasomc@economia.gob.mx  and/or jesus.figueroa@economia.gob.mx  
Website: " http://www.economia.gob.mx/comuni dad-negocios/c ompetitividad-
normatividad/normalizacion/catalogo-mexicano-de-normas " 
Text available online at: 
http://www.dof.gob.mx/index.p hp?year=2013&month=02&day=20  
http://members.wto.org/crnattachments/2013/tbt/MEX/13_0818_00_s.pdf