Proposal to amend para. 6.1.10. to address division by zero in formulas when an OVC-HEV consumes zero fuel under charge-depleting conditions, and amend Annex B8, para. 4.2.2. to modify the charge-depleting fuel efficiency FECD calculation formula for OVC-HEVs and OVC-FCHVs under Level 1B and 3-phase WLTP testing in Level 2. The amendment applies good engineering judgement optionally to add a dash rather than zero when data input justifiably leads to division by zero.