Another detail, which was added in at the trialogue stage, is the exemption from the common rules for so-called 'closed' systems, such as airports, hospitals, stations, industrial sites, and so on, which because of their specific individual features are subject to a more favourable system.
Un alt detaliu, adăugat în faza de trialog, este scutirea de la normele comune a aşa-numitelor sisteme "închise” (aeroporturile, spitalele, gările, spaţiile industriale etc.) care, datorită proprietăţilor individuale caracteristice, sunt supuse unui sistem mai favorabil.