ISO/IEC 15459-2:2015 specifies the procedural requirements to maintain identities and outlines the obligations of the Registration Authority and Issuing Agencies. ISO/IEC 15459-2:2015 excludes those entities where ISO has designated Maintenance Agencies or Registration Authorities to provide identity and/or identifier schemes. It does not apply to: freight containers, because their unique coding is specified in ISO 6346, Freight containers - Coding, identification and marking; vehicles, because their unique identification is specified in ISO 3779, Road vehicles - Vehicle identification number (VIN) - Content and structure; car radios, because their unique identification is specified in ISO 10486, Passenger cars - Car radio identification number (CRIN). The exclusion also applies to ISO 2108, Information and documentation - International standard book number (ISBN), and ISO 3297, Information and documentation - International standard serial number (ISSN).