152. The secretariat informed AC.3 that, in the absence of sponsor to continue the development of UN GTR No. 15, the maintenance and further development of UN GTR No.15 was nevertheless still being examined by GRPE. Following the improvements adopted in UN Regulation No. 154 in this session of AC.1, some Contracting Parties had shown interest to reflect those in a forthcoming proposal for an Amendment 7 to UN GTR No. 15. He added that a formal proposal to AC.3 was expected in forthcoming sessions of AC.3.