38. The expert from Japan introduced GRSP-72-06 to amend the requirement on the Thorax Compression Criterion (ThCC) of 5th female dummy in the case of vehicles of category N1 with a maximum permissible mass not exceeding 2,800 kg. He explained that the proposal would extend the protection of elderly people to this category of vehicles which currently applies to vehicle category M1. The expert from Italy expressed concerns that the proposal would entail a cost increase for vehicles that are generally not used by elderly people. The expert from OICA expressed a study reservation. GRSP agreed to discuss GRSP-72-06 in an ad hoc group led by the expert from Japan with the participation of the experts from France, Italy and OICA, and resume discussion at its May 2023 session, unless the ad hoc group provided an updated document for that session. In the meantime the expert from Japan was requested to provide crash data to justify the proposal.