This Leaflet contains the general conditions for disc brakes and their indicating equipment. The properties required for brake pads are specified as well as their frictional and geometrical requirements and the mechanical, physical and chemical features of both organic brake pads and sintered brake pads for different categories of vehicles. The approval procedure for brake pads including the test programmes to be used for each type is described. The instantaneous and the average coefficients of friction to be achieved are shown in diagrammatic form. The validity of the approval expires after a certain time. The internationally approved brake pads are listed by different applications in tables and the same is true for the internationally approved brake test benches. The Leaflet is completed by a glossary of terms, the test methods and measurements to be made.