11. GRBP recalled that, at its previous session, it had adopted the guidelines on antitampering provisions for Non-Original Replacement Exhaust Silencing Systems (NORESS) prepared by the expert from IMMA (ECE/TRANS/WP.29/GRBP/2023/17). GRBP invited IMMA and interested contracting parties to continue their activities with the aim of integrating the guidelines into the legal text of UN Regulation No. 92.