ISO 4217 codes (STANAG 1059, 9th edition) use "X" codes for imaginary exercise countries ranging from XXB for "Brownland" to XXR for "Redland", as well as for major commands such as XXE for SHAPE or XXS for SACLANT. Consequently, ISO 4217 can use "X" codes for non-country-specific currencies without risk of clashing with future country codes. The inclusion of EU (denoting the European Union) in the ISO 3166-1 reserved codes list, allows the euro to be coded as EUR rather than assigned a code beginning with X, even though it is a supranational currency. The ISO 4217 standard includes a crude mechanism
ISO/IEC JTC 1/SC 17/WG 1 Sub-Committee 17 administered standards. ISO/IEC JTC 1/SC 17/WG 1 ISO/IEC JTC 1/SC 17/WG 1 is a working group within ISO/IEC JTC1 of the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC), that facilitates standards development within the field of cards and personal identification. A national delegation of experts from various countries meet in person at WG1 to discuss and debate items detailed in a meeting agenda until a consensus is reached. These items include: draft standards, draft test methods, questions from the industry, proposals for new work items or other aspects relating to the Standards and Test