. /.  WORLD TRADE  
ORGANIZATION  G/TBT/N/MEX/100 
1 September 2004 
 
 (04-3631) 
Committee on Technical Barriers to Trade  Original:  Spanish  
  
NOTIFICATION 
 
The following notification is being circ ulated in accordance with Article 10.6. 
 
1. Member notifying:  MEXICO
 
If applicable, name of local government involved (Articles 3.2 and 7.2):    
2. Agency responsible:   Ministry of the Environment and Natural Resources (SEMARNAT) 
Name and address (including telephone and fax numbers and E-mail and Web site addresses, if available) of agency or authority designated to handle comments 
regarding the notification shall be indicated if different from above:   G e n e r a l  
Directorate of Standards/Ministry of the Economy (DGN/SE) Enquiry Point. 
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 applic able, otherwise national tariff heading.  
ICS numbers may be provided in  addition, where applicable):   New motor vehicles 
5. Title, number of pages and language(s) of the notified document:   Draft Mexican 
Official Standard PROY-NOM-042-SEMAR NAT-2003, Establishing the Maximum 
Permissible Limits for Emissions of N on-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 Us ing Gasoline, Liquefied Petroleum Gas, 
Natural Gas or Diesel Fuel, as well as for Emissions of Evaporative Hydrocarbons from the Fuel Systems of Such Vehicles. 
6. Description of content:   This Draft Mexican Official Standard establishes the permissible 
limits for emissions of non-methane hydro carbons, 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. 
This Standard will apply to new vehicles ma nufactured both in Mexico and abroad and 
definitively imported into and/or marketed in  national territory and will be binding upon the 
manufacturers, importers and/or traders of such vehicles. 
7. Objective and rationale, including the na ture of urgent problems where applicable:  
 Establish, with a view to protecting th e environment, the permissible limits for 
emissions of non-methane hydrocarbons, car bon monoxide, nitrogen oxi de and particles 
from the exhaust pipes of new motor vehicles of a gross vehicle weight not exceeding 
3,857  kg. 
8. Relevant documents:   Diario Oficial de la Federación  (Official Journal) of 24 August 2004 
9. Proposed date of adoption:   
Proposed date of entry into force:   } Not determined G/TBT/N/MEX/100 
Page 2  
 
10. Final date for comments:   23 October 2004 
11. Texts available from:  National enquiry point [ X ] or address, telephone and fax 
numbers and E-mail and Web site add resses, if available, of other body:    
Web site:  www.economia.gob.mx/?P=85 (Standards catalogue) 
E-mail:  ci dgn@economia.gob.mx 
General Directorate of Standards: 
Tel.:  (52-55) 5729-9300, Ext. 4156 
Fax:   (52-55) 5520-9715