(ECE/TRANS/WP.29/2014/86) Fourth progress report
(ECE/TRANS/WP.29/2012/34) Third progress report
(ECE/TRANS/WP.29/2011/86) Second progress report
(ECE/TRANS/WP.29/2010/136) First progress report
(ECE/TRANS/WP.29/AC.3/25) Authorization to develop the amendment
(ECE/TRANS/WP.29/AC.3/25/Rev.1) Revised authorization to develop the amendment