Those air fares which are "addressed directly or indirectly to the travelling public" have to include all applicable taxes, non-avoidable charges, surcharges and fees known at the time of publication (i.e. taxes, or duties, fees and other costs for the benefit of the airlines or of the airport operators.
Eiropas Parlaments prasa noteikt, ka "gaisa pārvadājumu maksās, kas publicētas jebkādā veidā, tostarp internetā, [..]jāiekļauj visus piemērojamos nodokļus, nodevas, piemaksas un maksas, kuras zināmas publicēšanas brīdī."