ISO/IEC 24727 defines a set of programming interfaces for interactions between integrated circuit cards and external applications to include generic services for multi-sector use. This part of ISO/IEC 24727 standardizes the connectivity and security mechanisms between the clientapplication and the card-application. It specifies API-Administration of service-independent and implementation-independent ISO/IEC 24727 compliant modules@ including security@ that enables action requests to a specific card-application of an ICC such that@ when coupled to data model and content discovery operations@ the card-application can be used by a variety of client-applications.