1.1. This Regulation applies to new pneumatic tyres of Classes C1, C2 and C3 with regard to their sound emissions, rolling resistance and to adhesion performance on wet surfaces (wet adhesion). It does not, however, apply to: 1.1.1. Tyres designed as "Temporary use spare tyres" and marked "Temporary use only"; 1.1.2. Tyres having a nominal rim diameter code ≤ 10 (or ≤ 254 mm) or ≥ 25 (or ≥ 635 mm); 1.1.3. Tyres designed for competitions; 1.1.4. Tyres intended to be fitted to road vehicles of categories other than M, N and O; 1 1.1.5. Tyres fitted with additional devices to improve traction properties (e.g. studded tyres); 1.1.6. Tyres with a speed rating less than 80 km/h (speed symbol F); 1.1.7. Tyres designed only to be fitted to vehicles registered for the first time before 1 October 1990. 1.1.8. Professional off-road tyres. 1.2. Contracting Parties shall issue or accept approvals to rolling sound and/or wet adhesion and/or rolling resistance.