In prior versions, the rules were divided into four categories, but the 11 pre-defined terms of "Incoterms 2020" are subdivided into two categories "based only on method of delivery". The larger group of seven rules may be used regardless of the method of transport, with the smaller group of four being applicable only to sales that solely involve transportation by water where the condition of the goods can be verified at the point of loading on board ship. They are therefore not to be used for containerized freight, other combined transport methods, or for transport by road, air or rail.