Specifies the minimum requirements for the repairing and retreading of car, truck and bus pneumatic tyres used in highway service. It specifies certain constructional features such as the examination, limits of damage, preparations and permissible repairs of the tyre carcass before processing, and the marking and inspection of the tyre after curing. Minimum performance levels are also given. Except where otherwise stated, the requirements apply to both tubed and tubeless tyres.