ISO/TS 17575 defines the information exchange between the Front End and the Back End in Electronic Fee Collection (EFC) based on autonomous on-board equipment (OBE). ISO/TS 17575-3:2011 defines the data to be used for a description of individual charging systems in terms of charged geographical objects and charging and reporting rules. For every Toll Charger's system, attributes defined in ISO/TS 17575-3:2011 are used to transfer data to the Front End in order to instruct it which data to collect and report.