This Technical Specification constitutes the 2nd edition of CEN/TS 16794-1. It sets out the technical requirements to be met by contactless Public Transport (PT) devices in order to be able to interface together using the ISO/IEC 14443 standard contactless communications protocol. This Technical Specification applies to PT devices: PT readers which are contactless fare management system terminals acting as a PCD contactless reader based on ISO/IEC 14443 standard series; PT objects which are contactless fare media acting as a PICC contactless object based on ISO/IEC 14443 standard series. This new version also addresses interoperability of consumer-market NFC mobile devices, compliant to NFC Forum specifications, with above mentioned PT devices. An interface–oriented test approach is used to evaluate the conformity of PT devices and is defined in CEN/TS 16794-2. Application-to-application exchanges executed once contactless communication has been established at RF level fall outside the scope of this document. In line with the rules on independency between OSI protocol layers, this document works on the assumption that application-to-application exchanges are not contingent on the type of contactless communication established or by the parameters used for the low-level protocol layers that serve as the platform for these application-to-application exchanges.