The deadline for submission of official documents to the UNECE secretariat is 27 January 2017 (twelve weeks prior to the session).
54. The expert from Germany proposed to align in UN Regulation No. 118 the wording for the upper boundary surface by replacing “roof” by “ceiling” (GRSG-112-12). GRSG noted general support and agreed to resume consideration at its next session on the basis of an official document.