EU inspectors are not authorized to carry out checks themselves: they accompany national control authorities in their various activities in teams of two, on tours of duty generally lasting two weeks.They subsequently prepare confidential reports to inform the Commission of their findings.
Οι αποστάσεις συνδυάζονται επίσης με την κακοκαιρία, η οποία μερικές φορές παρεμποδίζει τις επιβιβάσεις.