Kadar izvajalci navigacijskih služb zračnega prometa izvajajo storitve v svežnju, morajo v svojih internih računovodskih evidencah opredeliti ustrezne stroške in dohodke za navigacijske storitve, ki jih razčlenijo v skladu z Eurocontrolovimi načeli za določanje stroškovne baze za nadomestila za uporabo naprav na zračnih poteh in izračun cen za enoto storitve in, kadar je to primerno, vodijo konsolidirane računovodske izkaze za druge storitve, ki niso povezane z navigacijskimi službami zračnega prometa, kakor bi morali storiti, če bi zadevne službe zagotavljala ločena podjetja.
When providing a bundle of services, air navigation service providers shall, in their internal accounting, identify the relevant costs and income for air navigation services, broken down in accordance with Eurocontrol's principles for establishing the cost-base for route facility charges and the calculation of unit rates and, where appropriate, shall keep consolidated accounts for other, non-air-navigation services, as they would be required to do if the services in question were provided by separate undertakings.