. /.  WORLD TRADE  
ORGANIZATION  G/TBT/N/CAN/87 
19 February 2004 
 (04-0711) 
Committee on Technical Barriers to Trade Original:  English/ 
 French 
  
 
NOTIFICATION 
 
The following notification is being circ ulated in accordance with Article 10.6. 
 
1. Member to Agreement notifying:   CANADA
 
If applicable, name of local government involved (Articles 3.2 and 7.2):         
2. Agency responsible:   Department of Transport 
Name and address (including telephone and fax numbers, 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:         
Canadian Enquiry Point, 200-270 Albert St reet, Ottawa, Ontario, Canada, K1P 6N7 
Tel.:  +1 613 238 3222, Fax.: +1 613 569 7808, E-mail: info@scc.ca 
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):   Hydraulic, electric, and 
air brake systems (ICS: 43.040.40) 
5. Title, number of pages and langua ge(s) of the notified document:   Technical Standards 
Document No. 105, “Hydraulic and Electric Brake Systems” - Revision 2, and  
Technical Standards Document No. 121, “Air Brake Systems” - Revision 2 (Pages 277-278, 
English and French) 
6. Description of content:   Notice is hereby given, pursuant to section 12 of the Motor 
Vehicle Safety Act  and sections 16 and 17 of the Motor Vehicle Safety Regulations , that the 
Department of Transport has revised Tec hnical Standards Document (TSD) No. 105, 
"Hydraulic and Electric Brake Systems," and TSD No. 121, "Air Brake Systems," which 
specify requirements governing hydraulic, electric, and air brake systems.  
TSD No. 105, "Hydraulic and Electric Brake Systems," and TSD No. 121, "Air Brake 
Systems," reproduce U.S. Federal Motor Vehicl e Safety Standards No. 105 and No. 121 of 
the same titles, and they are incorporated by reference in sections 105 and 121 of the Motor 
Vehicle Safety Regulations . 
Revision 2 of TSD No. 105 introduces a new re quirement for vehicles with a gross vehicle 
weight rating greater than 4 536 kg that are equipped with hydraulic and electric brakes to 
pass the braking-in-a-curve test, whereas th e new revision of TSD No. 121 extends this 
requirement, which currently applies to truck tractors only, to single-unit trucks and buses 
that are equipped with air brakes. The addition of this test is intended to complement the 
existing antilock brake system and stopping distance requirements.  G/TBT/N/CAN/87 
Page 2  
 
The revision of TSD No. 105 also adds the definitions "full brake application" and 
"maximum drive-through speed," and Table 1 in  both TSDs has been updated to include the 
new test. In addition, a requirement has been  added to both TSDs that, when alternative 
compliance options are permitted, manufacturers must identify, prior to certification, the 
option that they have selected for a particular vehicle, make, or model.   
Note:  TSD No. 105 – Revision 1 was notified under G/TBT/Notif.00/380, while TSD No. 
121 – Revision 1 was notified under G/TBT/N/CAN43. 
7. Objective and rationale, including the na ture of urgent problems where applicable:  
Protection of human safety 
8. Relevant documents:   Canada Gazette, Part  I, 14 February 2004 
9. Proposed date of adoption:  14 February 2004  
Proposed date of entry into force:  14 August 2004 
10. Final date for comments:   not stated 
11. Texts available from:  National enquiry point [ X] or address, telephone and fax 
numbers, e-mail and web-site addresses, if available of the other body:        
The electronic version of these do cuments can be downloaded at: 
 
http://canadagazette.gc.ca/partI/2004/20040214/pdf/g1-13807.pdf  (Canada Gazette Part 1) 
http://www.tc.gc.ca/roadsafet y/mvstm_tsd/index_e.htm  (Technical Standards Document 
(TSD))