Article 1

The European Union shall apply UNECE Regulation No 9 Uniform provisions concerning the approval of category L₂, L₄ and L₅ vehicles with regard to sound emission, UNECE Regulation No 63 Uniform provisions concerning the approval of L₁ category vehicles with regard to sound emission and UNECE Regulation No 92 Uniform provisions concerning the approval of non-original replacement exhaust silencing systems (NORESS) for vehicles of categories L₁, L₂, L₃, L₄ and L₅ with regard to sound emission.