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/TC 68 ISO/TC 68 ISO/TC 68 is a technical committee formed within the International Organization for Standardization (ISO), of Geneva, Switzerland, tasked with developing and maintaining international standards covering the areas of banking, securities, and other financial services. As the standards organization under ISO responsible for the development of all international financial services standards, ISO/TC 68 plays a key role in the development and adoption of new technologies in the banking, brokerage and insurance industries. Many of its current work projects involve developing ecommerce standards such as better online security for financial transactions, XML standards for financial transactions and standards to reduce