ECE/TRANS/WP.29/GRSP/46, para. 34, ECE/TRANS/WP.29/GRSP/2009/17, ECE/TRANS/WP.29/GRSP/2010/13, (ECE/TRANS/WP.29/GRSP/2009/10)
Documentation: ECE/TRANS/WP.29/GRSP/46, par. 34; ECE/TRANS/WP.29/GRSP/2009/17; ECE/TRANS/WP.29/GRSP/2010/13; ECE/TRANS/WP.29/GRSP/2009/10.