Category Explanation
A Motor cycles with or without a sidecar, invalid carriages and threewhelled motor vehicles with an unladen weight no exceeding 400 kg (900 lbs.).
B Motor vehicles used for the transport of passengers and comprising in addition to the driver's seat, at most 8 seats, or these used for the transport of goods and having a permissible maximum weight not exceeding 3,500 kg (7,700 lbs.). Vehicles in this category may be coupled with a light trailer.
C Motor vehicles used for the transport of goods and which the permissible maximum weight exceeds 3,500 kg (7,700 lbs.). Vehicles in this category may be coupled with a light trailer.
D Motor vehicles used for the transport of passengers and comprising in addition to the driver's seat, more than 8 seats. Vehicles in this category may be coupled with a light trailer.
E Motor Vehicles of categories B, C or D for which the driver is licensed, with other than light trailer.

These categories are used for International Driver Document. Possessing specified category is not equal to having the right to drive vehicle described in the category on the territory of foreign country. Once IDD is a translation of foreign driver's license, IDD categories describe vehicles that driver is permitted to operate in the country where his original driver license was issued. Thus when planning to drive abroad, you should check with foreign country authorities if your driver license with IDD is sufficient to drive vehicle you are planning to drive abroad.

From our experience we know that in most countries you can drive passenger car or small van (category B) using your original driver license and IDD. When you plan to drive truck or bus you are required to check with local authorities what documents are required to operate such vehicle in this country; when you plan to use passenger car for other than leisure purposes you also need to contact local authorities and ask for information concerning requirements for commercial driving.