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.

28. The expert from Sweden introduced ECE/TRANS/WP.29/GRSP/2013/9, containing an alternative to the proposal for expanding the scope of the UN Regulation to all N categories of vehicles, as suggested by the expert from the Russian Federation (ECE/TRANS/WP.29/GRSP/2012/19). The expert from OICA introduced GRSP-53-02, providing a layout of a possible testing configuration for each configuration of N categories. He stated that these different configurations make unfeasible the application of all tests to all N types. The expert from the Russian Federation introduced GRSP-53-03 to stress that all vehicle of category N (even N1 category of vehicle) should be covered by UN Regulation No. 29 and proposed to assess with GRSP experts which of the test configurations (A, B and C) of the UN Regulation should be applied to each N vehicle category.

29. Finally, GRSP agreed to resume consideration on this subject at its December 2013 session on the basis of a possible joint proposal prepared by the experts from the Russian Federation, Sweden and OICA.

20. The expert from OICA introduced ECE/TRANS/WP.29/GRSP/2013/19, proposing a test configuration (A, B and C) for each N vehicle category. GRSP adopted ECE/TRANS/WP.29/GRSP/2013/19 not amended and requested the secretariat to submit it to WP.29 and AC.1, for consideration and vote at their June 2014 sessions as draft Supplement 2 to the 03 series of amendments to the UN Regulation.