37. The Chair of the group of interested experts on Rechargeable Energy Storage Systems (RESS) introduced GRSP-48-01-Rev.1 (superseding GRSP-48-10) concerning the terms of reference of the group. The experts from EC and the United Kingdom expressed concerns on the lack of clarity in the programme of work and on expert participation in the group and requested a clearer framework. GRSP recommended to all the Chairs of the informal groups to ensure traceability of expert mandates for their participation in the meetings. Moreover, GRSP requested all experts to provide comments on GRSP-48-01-Rev.1 to the Chair of the group to finalize a proposal at the May 2011 session of GRSP. Finally, GRSP agreed to preliminarily inform WP.29 at its March 2011 session on the basis of an informal document.