38. For its seventy-first session, scheduled to be held in Geneva from 28 to 31 January 2020, GRBP decided to keep the same structure of the provisional agenda and include, in particular, UN Regulations Nos. 41, 108, 109, 117 (document ECE/TRANS/WP.29/GRBP/2019/14 and Terms of Reference of IWG WGWT), 138 and the item on road surface labelling. GRBP also noted that the deadline for the submission of official documents to the secretariat would be 4 November 2019, twelve weeks prior to the session. The Chair called on GRBP experts to submit informal documents at least one week before the session in order to give other experts an ample opportunity to study them.