In document GRSP-54-04, CLEPA proposed changes to improve the reproducibility of the luggage impact test described in annex 9 of UN R17. Japan proposes to specify only the minimum moment of inertia in the test (where CLEPA proposed a minimum-maximum range.

Proposal to define the moment of intertia in the luggage-impact test as “0.3 ± 0.05 kgm² (around all 3 principal axis of inertia of the luggage blocks)”. UN R17 presently lacks such a definition, resulting in variations in trajectory and behavior of the luggage cubes before and after impact.

Proposal to clarify the prohibition of side-facing seats on category N vehicles and close the related loophole in the current text in this regard.

Proposal by the secretariat to correct a reference to UN R25 to refer to the 04 series of amendments rather than to the 03 series of amendments.

UN R17, R25 and R80 address head restraints for various categories of vehicles. In order to prevent redundant application of these regulations, this amendment clarifies that head restraints approved under UN R17 would be exempted from the requirements of UN R25 and that UN R25 does not apply to coach and bus seats approved under UN R80.