24. GRSP resumed consideration on a proposal (ECE/TRANS/WP.29/GRSP/2020/10 and amendment GRSP-67-12) tabled by the expert from the Netherlands aimed at identifying hydrogen-fuelled buses which would be consistent with already existing regulated identification for Liquid Petroleum Gas, Compressed Natural Gas and Liquid Natural Gas fuelled buses. The expert from OICA introduced GRSP-67-29 amending, among others, the proposed transitional provisions. GRSP agreed to resume discussion of this subject at its December 2020 session based on a revised proposal tabled by the expert from the Netherlands in cooperation with the expert from OICA.