The UN IWG for CLIV is in Phase 2 on developing a new UN Regulation on Children Left in Vehicles (CLIVs) for vehicle categories M2 and M3. The draft UN Regulation includes requirements with regards to visual and audible external warnings in buses and coaches to assist in the prevention of children being left inside. The IWG has prioritized the development of a new UN Regulation for buses and coaches in the first instance.