Proposal from the SLR informal group to improve the text of the draft new UN Regulation on retro-reflecting devices (RRD). The proposal adds that the definitions in UN R48 apply unless the regulation or the vehicle-category-specific regulations (UN R53, 78, 86) specify different applicable definitions, to clarify that the construction provision and prohibition on use of paints or varnishes under paragraph 4.1.6 only apply to retro-reflectors, to correct the omission of Class F devices from the title of paragraph 5.4., and to add the water-resistance test (from UN R69 and R70) to Annex 7. The amendments, if approved, are intended to be considered with the original draft of the new Regulation sent to the November 2018 WP.29 for adoption (WP.29/2018/159).