The Compressed Gas Association (CGA) is forming an Ad Hoc Committee (AHC) to review and, if necessary, respond to papers submitted for the November/December 2023 sessions of the United Nations Sub-Committee of Experts on the Transport of Dangerous Goods (UN SCETDG) and UN Sub-Committee of Experts on the Globally Harmonized System of Classification and Labelling of Chemicals (UN SCEGHS).