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.

12. The expert from IMMA presented a draft document for reference with the industry guidelines on antitampering provisions for Non-Original Replacement Exhaust Systems (NORESS) (ECE/TRANS/WP.29/GRBP/2023/17). Various experts were in support of the guidelines and stressed the need for regular updating in the future. GRBP adopted the document and requested the secretariat to issue it as a document of reference on the dedicated webpage. As a next step, GRBP agreed to study the possibility of integrating the guidelines, in a suitable language, into UN Regulation No. 92.