40. The expert from NGV Global introduced GRSG-116-21 to amend Annex 3A of the Regulation on the design criteria and specifications for Compressed Natural Gas (CNG) cylinders with composite materials in line with standard ISO 11439. The proposal received general support. GRSG agreed to resume consideration of this subject at its next session and requested the secretariat to circulate GRSG-116-21 with an official symbol.