travel by the most direct and most economic route,
distance of at least 100 km between the place of the meeting and the normal place of work,
travel by rail: first class,
travel by air: economy class, unless a cheaper fare can be used (e.g. Apex); air travel is allowed only for return journeys of more than 800 km,
travel by car: reimbursed on the basis of the equivalent first class rail fare.