This Technical Specification establishes requirements for short-range communication for the purposes of augmenting the localisation in autonomous electronic fee collection (EFC) systems. Localisation augmentation serves to inform OBE about geographical location and the identification of a charge object. This Technical Specification specifies the provision of location and heading information and security means to protect from the manipulation of the OBE with false road-side equipment (RSE). The localisation augmentation communication takes place between an OBE in a vehicle and fixed road-side equipment. This Technical Specification is applicable to OBE in an autonomous mode of operation. This Technical Specification defines attributes and functions for the purpose of localisation augmentation@ by making use of the DSRC communication services provided by DSRC Layer 7@ and makes these LAC attributes and functions available to the LAC applications at the RSE and the OBE. Attributes and functions are defined on the level of ADUs (Application Data Units@ see Figure 1). As depicted in Figure 1@ this Technical Specification is applicable to: ?? the application interface definition between OBE and RSE; ?? the interface to the DSRC application layer@ as specified in ISO 15628 and EN 12834; ?? the use of the DSRC stack. The localisation augmentation communication is suitable for a range of short-range communication media. This Technical Specification gives specific definitions regarding the CEN DSRC stack as used in EN 15509@ and Annexes C@ D and E give the use of ISO CALM IR@ UNI DSRC and ARIB DSRC. This Technical Specification contains a protocol implementation conformance statement (PICS) proforma and informative transaction examples. This Technical Specification is not applicable to test specifications.