ECE/TRANS/WP.29/GRSP/46, para. 10, ECE/TRANS/WP.29/GRSP/2010/5, ECE/TRANS/WP.29/GRSP/2010/6, (ECE/TRANS/WP.29/GRSP/2009/20), (ECE/TRANS/WP.29/AC.3/23)
Documentation: ECE/TRANS/WP.29/GRSP/46, par. 10; ECE/TRANS/WP.29/GRSP/2010/5, ECE/TRANS/WP.29/GRSP/2010/6; ECE/TRANS/WP.29/GRSP/2009/20; ECE/TRANS/WP.29/AC.3/23.