ECE Regulation No. 64 sets forth the uniform provisions concerning the approval of vehicles with regard to their temporary-use spare wheels/tyres and run-flat tyres. This regulation is essential to ensure that vehicles equipped with these types of tyres can maintain safety and performance standards even when operating under temporary or emergency conditions.

The regulation specifies the technical standards for the construction and performance of temporary-use spare wheels/tyres and run-flat tyres. These tyres must be able to support the vehicle's weight and maintain adequate performance for a limited period, allowing the vehicle to be driven to a repair facility. Temporary-use spare wheels/tyres and run-flat tyres must be clearly marked and labelled to indicate their specific use and limitations, including information such as maximum speed, inflation pressure, and load capacity.

Testing procedures are outlined to ensure compliance, including assessments of the tyre's performance under various conditions such as speed, load, and durability. Manufacturers must conduct these tests to demonstrate that their products meet the required standards. Additionally, clear instructions must be provided to the vehicle owner on the proper use and limitations of temporary-use spare wheels/tyres and run-flat tyres, ensuring that users are aware of how to safely use these tyres in case of an emergency.

The TAT Lab is authorized to perform testing and certification for compliance with ECE Regulation No. 64. This includes conducting all necessary tests to ensure that temporary-use spare wheels/tyres and run-flat tyres meet the specified standards. By performing these tests, TAT Lab helps enhance road safety in Iran by ensuring that vehicles equipped with these tyres can maintain safety and performance standards even under temporary or emergency conditions.