Document GRE/2013/65/Rev.1 proposes a new class F of marking materials designed with chevron type pattern to be applied to special utility vehicles or trailers not ordinarily covered by standard contour marking materials. The proposal also attempts to harmonize a number of national requirements. Japan, however, prohibits white retro-reflecting materials at the rear of vehicles for safety reasons. Therefore, Japan proposes to clarify that the approval of Class F retro-reflective markings is dependent upon their definition within national regulatory requirements.