29. The expert from Sweden introduced GRSP-52-28, proposing an alternative to the scope of the UN Regulation as suggested by the expert from the Russian Federation (ECE/TRANS/WP.29/GRSP/2012/19). He clarified that the mandate of the informal working group had been the development of new testing procedures for trucks of categories N2 with a gross vehicle mass exceeding 7.5 t and for categories N3. He added that the testing procedures for trucks of categories N1 and N2 with a gross vehicle mass not exceeding 7.5 t were to be left unchanged. GRSP agreed to keep GRSP-52-28 as a reference in the agenda and to resume discussion on this subject at its May 2013 session on the basis of proposals prepared by the experts from Sweden and OICA.

30. The expert from Germany gave a presentation (GRSP-52-21) to introduce a proposal (ECE/TRANS/WP.29/GRSP/2012/24), aimed at allowing arrangements of the test dummy to enable upper legs rotation around the vertical and transverse axis. He added that these improvements would allow a more realistic assessment of the survival space in the cab. The expert from the Russian Federation did not oppose the proposal, however, he stated that he preferred a linear and geometric assessment criteria of the survival space (as presently found in UN Regulation No. 33) rather than using a dummy. Finally, GRSP agreed to remove the square brackets from the text of ECE/TRANS/WP.29/GRSP/2012/24 and adopted it not amended. The secretariat was requested to submit ECE/TRANS/WP.29/GRSP/2012/24 to WP.29 and AC.1, for consideration and vote at their June 2013 sessions as draft Supplement 2 to the 02 series of amendments and as Supplement 1 to the 03 series of amendments to UN Regulation No. 29.