Allowed to tow motorcycles with a side trailer.✓Правильный ответ
Towing of motorcycles without side trailer is allowed.
Allowed in both cases.
Объяснение
A motorcycle fitted with a sidecar may be towed because the sidecar gives the vehicle the lateral support required for this operation. A two-wheeled motorcycle without a sidecar lacks that stability, so the permission does not extend to the unsupported configuration.