BS ISO 6166:2021pdf download.Financial services-International securities identification number ( ISIN ).
No worldwide numbering system existed at the time of the publication of the first edition of BS ISO 6166. Countries with a developed financial market identified issues of securities by means of code numbers, which are without any significance outside the country concerned. Instruments of the same issue were identified by means of different numbers in the country where they were physically held, booked or both, with the result that the national numbers may not be applicable in cross-border transactions.
Because of its strong rationalization effect, an internationally applicable numbering system substantially facilitates and supports international business in financial instruments. Such a system is provided by BS ISO 6166. Since the publication of the first edition of BS ISO 6166, its scope has expanded from a focus on securities to a much broader range of financial instruments. In addition, since the publication of the first edition, the Registration Authority (RA) has relied on the work of national numbering agencies (NNAs) which play an integral role in this rationalization effort and in the implementation of BS ISO 6166.
In preparing BS ISO 6166, care has been taken to conserve the national systems to the maximum possible extent, not only because of the good routine and valuable experience collected in this field but also to facilitate the adoption of the worldwide system. Moreover, it provides a system which is easy to apply internationally and establishes an information network which ensures that the required
BS ISO 6166 provides a uniform structure for the identification of financial instruments as well as referential instruments (see Annex A) using a unique identification code and associated minimum descriptive data (see Annex B).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of BS ISO 6166. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
Iso 3166 (all parts), Codes for the representation of names of countries and their subdivisions
Iso 4217, Codes for the representation of currencies
ISO 8601 (all parts), Date and time format
ISO 10962, Securities and related financial instruments — Classification offinancial instruments (CFI) code
Iso 17442 (all parts), Financial services — Legal entity identifier (LEI)
The ISIN shall consist of the following (see Annex E for examples):
a) A prefix using the alpha-2 country codes or reserved codes specified in the ISO 3166 series; “XS”, “EZ” or “ZZ” as specified in Annex A. Table A.1 or other prefixes as may be determined by the RA (refer to the RA website for a complete list of ISIN prefixes).
b) The basic code, which is nine characters (alphanumeric) in length. Where the existing national code consists of nine characters, this code may be used. Where the existing national code consists of fewer than nine characters, this also may be used, but zeros shall be inserted in front of the national code. Where a national check digit exists, it shall be regarded as part of the basic code within the nine characters.
c) A check digit, computed using the modulus 10 “double-add-double” formula as specified in Annex C.BS-ISO-6166-2021