The operation of buses is not prohibited if:

• 1On buses with a maximum permissible mass exceeding 3.5 tonnes, the wheel chocks (at least two) are absent.
• 2Anti-skid chains are not installed on the wheels of the bus's drive axle when there is snow or ice on the carriageway, as well as during icy conditions.
• 3Tyres with a retreaded tread are installed on the rear axle of the bus.