20. GRB recalled the WP.29 request to introduce, in the medium term, an alternative acronym for “Replacement Exhaust Silencing System” (RESS) in Regulation No. 92 (WP.29-165-16). As a replacement, the experts from IMMA and OICA proposed a new term “Non-Original Replacement Exhaust Silencing System” (NORESS). GRB preliminary agreed with this proposal and noted that it was already used in the amendment proposal for Regulation No. 92 (GRB-63-09).