. /. WORLD TRADE  
ORGANIZATION   
G/TBT/N/MEX/247 
18 December 2012 
 (12-6923) 
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, 5° piso, Ala "B" 
Fraccionamiento Jardines en la Montaña 
Delegación Tlalpan, México, D.F., código postal 14210 E-mail: jose.wilson@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 app licable, otherwise national tariff heading.
ICS numbers may be provided in addition, where applicable):   Diesel-powered road 
vehicles (International Classification for Standards (ICS) code 43.060). 
5. Title, number of pages and lang uage(s) of the notified document:   Proyecto de 
Modificación a la Norma Oficial Mexi cana 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" (Draft Amendment to Mexican Official Standard NOM-045-SEMARNAT-2006:  
"Environmental protection.  Diesel-powered road vehicles.  Maximum permissible opacity levels, test procedure and techni cal characteristics of measuring equipment") 
(15 pages, in Spanish). 
6. Description of content:  The notified text establishes the maximum permissible emission 
levels, expressed in terms of a light absorption coefficient or percentage opacity, for exhaust 
emissions from diesel-powered motor vehicles, as well as the applicable test method and the 
technical characteristics of the measuring equipment used. 
This text is binding on the owners or lega l possessors of diesel-powered road vehicles, 
control centres, vehicle verification units and the competent authorities.  It does not apply to 
diesel-powered machinery used in agricultu ral, construction and mining activities.  G/TBT/N/MEX/247 
Page 2  
 
  7. Objective and rationale, including the nature of urgent problems where applicable:  
Environmental protection 
8. Relevant documents:  
- G/TBT/N/MEX/116; 
- Corresponds in part to ISO 11614 (Chapter 5 "Principles", Chapter 6 "Specifications" 
and Chapter 7 "Design of instruments for measurement of opacity"); 
- Corresponds in part to Council Directive 72/306/EEC (Annex VII "Characteristics of 
opacimeters"); 
- Proyecto de Modificación a la Norma Oficial Mexicana NOM-045-SEMARNAT-2006, 
Protección ambiental - Vehículos en circula ción que usan diesel como combustible - 
Límites máximos permisibles de opacidad, pr ocedimiento de prueba y características 
técnicas del equipo de medición  (Draft Amendment to Mexican Official Standard 
NOM-045-SEMARNAT-2006:  "Environmental protection.  Diesel-powered road vehicles.  Maximum permissible opacity levels, test procedure and technical 
characteristics of measuring equipment").  Available at: 
http://207.248.177.30/regulaciones/scd _expediente_3.asp?ID=04/0920/231112 . 
9. Proposed date of adoption: 
Proposed date of entry into force: Not applicable. 
60 calendar days after publication of the final Mexican Official Standard in the Official Journal.  
10. Final date for comments:   4 February 2013 
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 E-mail: normasomc@economia.gob.mx  and/or jesus.figueroa@economia.gob.mx  
Website: " http://www.economia.gob.mx/comunidad-negocios/normalizacion/catalogo-
mexicano-de-normas " 
 
Text available online at: http://dof.gob.mx/index.php? year=2012&month=12&day=06 
http://members.wto.org/crnattach ments/2012/tbt/MEX/12_4751_00_s.pdf