86. Agenda item, 16.4, gtr No. 4, Worldwide harmonized Heavy Duty Certification (WHDC). The representative of the EU recalled the consent by WP.29 and AC.3 at their March 2010 session to establish an informal group on Heavy Duty Hybrids to develop, in the framework of gtr No. 4 on WHDC, a new test procedure for the emissions of pollutants and CO2 emissions of such vehicles. He informed AC.3 about the progress made by the informal group. AC.3 welcomed that information and agreed to resume consideration of this subject at its next session on the basis of a concrete proposal to develop an amendment to gtr No. 4.