This standard specifies implementations of selected ISO/IEC 7816-4 : 1995 commands used within the Singapore context. This document covers Access Conditions, Secure Messaging, Secure Writing, Basic Interindustry commands and Transmission-oriented Inter-industry commands. Additional commands required by key applications in Singapore are set out under Administration commands.\nThe Access Conditions of various operations on MF, DF and EFs include access condition groups, its interpretation, and access condition coding.\nSecure Messaging in this specification includes the description of two methods : Encrypted data in the data field and Plain data plus padding 3 bytes of cryptographic checksum in the data field, with further description of the secure messaging process using the second method. The Secure Messaging process covers commands that send data to the card and commands that only receive data from the card, for both the terminal and the card.\nThe commands added to this specification over and above ISO/IEC 7816-4 : 1995 are covered in this document under the following headings: Definition and Scope, Conditional Usage and Security, Command Message, Response Message and Status Conditions.\n