29. The secretary of the informal group on Heavy Duty Hybrids (HDH) introduced GRPE-63-18 and GRPE-63-19, describing the work accomplished. He explained that the test procedure for heavy duty hybrids may be based on a wheel power cycle or on the vehicle cycle, and he announced the group’s intention to resume considering whether only one of these approaches shall be retained for the future work.

30. It was agreed that the group should meet in conjunction with the next GRPE session, in June 2012.