WLTP-DTP-LabProcICE	WLTP-DTP Subgroup on Lab Process-Internal Combustion Engines Last session: November 2011
WLTP-DTP-E-Lab	WLTP Subgroup on Electric and Hybrid Vehicle Requirements Last session: January 2012
WLTP-DTP-PMPN	WLTP-DTP Subgroup on PM and PN Measurement Last session: August 2010
WLTP-DTP-AP	WLTP-DTP Subgroup on Additional Pollutants Last session: March 2011