47. GRSG noted GRSG-129-01 proposed by the expert from the Kingdom of the Netherlands on behalf of IWG IWVTA to delete the Unique Identifier (UI) marking provisions. GRSG agreed to keep it as a reference awaiting future amendments to the corresponding UN Regulations to incorporate the proposed deletion of UI. GRSG agreed to resume discussion on this subject on the basis of new documents for the next sessions of GRSG.