This document specifies the data transfer models between roadside equipment (RSE) and integrated circuit cards (ICCs) and the interface descriptions between the RSE and on-board equipment (OBE) for on-board accounts using an ICC. It also provides examples of interface definitions and transactions deployed in several countries. This document covers: —    data transfer models between the RSE and ICC which correspond to the categorized operational requirements and the data transfer mechanism for each model; —    the interface definition between the RSE and OBE based on each data transfer model; —    the interface definition for each model; —    the functional configuration; —    RSE command definitions for ICC access; —    the data format and data element definitions of RSE commands; —    a transaction example for each model (Annex B).