55. GRSP resumed discussion on UI marking. The expert from CITA introduced GRSP-73-58 (based on WP.29-188-20) listing all UN Regulations under GRSP purview and providing information that his organization deems relevant. He added that, in his opinion, none of the UN Regulations under GRSP needed UI. The expert from Germany stated that benefits would not be introduced by UI. The expert from Spain suggested that amending the 1958 Agreement would be more viable than amending each UN Regulations to prohibit UI. GRSP agreed to discuss its final position at its December 2023 session.