United States of America
28 Aug 2009 Proposal to develop a new global technical regulation on Worldwide harmonized Light Vehicle Test Procedures (EU, Japan, and USA) 2009-08-28 EU Japan USA
22 Dec 2009 United States of America statement and proposal concerning soak period and cold start weighting options in gtr No. 4 (USA) WP.29/2010/49 2009-12-22 USA
18 Dec 2009 Proposal to develop a new global technical regulation on worldwide harmonized light vehicle test procedures (Japan, EU, and USA) WP.29/AC.3/26 2009-12-18 Japan EU USA