The purpose of this standard is to specify the minimum requirements for an overfill prevention system as defined by : - functions - major components - characteristics - certification requirements - test methods. The provisions of this standard are applicable to overfill prevention systems to be used on vehicles transporting liquid fuels (class 3 liquids of ADR/ RID - European Agreement concerning the International Carriage of Dangerous Goods by Road / European Agreement concerning the International Carriage of Dangerous Goods by Rail) with flashpoints less than 61 °C of the regulations in force (ADR/ RID) and on the corresponding gantries.