This Regulation applies to: 1.1.1. Replacement brake lining assemblies intended for use in friction brakes forming part of a braking system of vehicles of category M, N, L and O which have a type approval in accordance with Regulations Nos. 13, 13-H or 78. 1.1.2. Replacement drum brake linings designed to be riveted to a brake shoe for fitment to and use on vehicles of category M3, N2, N3, O3 or O4 having a type approval in accordance with Regulation No. 13. 1.2. Replacement brake lining assemblies may be approved for fitment and use on powerdriven vehicles and trailers having type approval in accordance with Regulation No. 13 or Regulation No. 78. Replacement drum brake linings designed to be riveted to a brake shoe may be approved for fitment and use on power-driven vehicles and trailers having type approval in accordance with Regulation No. 13 and classified in categories M3, N2, N3, O3 and O4. 1/