Proposal to amend Annex B4, para. 6.2.1. to specify that three vehicles selected by the responsible authority shall cover the range of vehicles planned to be measured, and that each change of range requires new selection, but original measurements can be re-used if a vehicle is reselected, and amend para. 6.2.4. to establish approval criteria requiring the difference in cycle energy between wind tunnel method and coastdown method to be within 0.05 for each of three vehicles and within 0.02 for arithmetic average, to require approval recording, to permit facility use for two years with extension every two years upon manufacturer evidence of modifications, measurement results at three-month intervals meeting repeatability and force measurement accuracy requirements, and to require separate approval for each roller chassis dynamometer or moving belt and wind tunnel combination and each combination of wind speeds used.