MT 543 Field Specifications

18. Field 35B: Identification of the Financial Instrument

FORMAT

Option B

[ISIN1!e12!c] [4*35x]

(Identification of Security) (Description of Security)

PRESENCE

Mandatory in mandatory sequence B

DEFINITION

This field identifies the financial instrument.

NETWORK VALIDATED RULES

At least Identification of a Security (Subfield 1) or Description of Security (Subfield 2) must be present; both may be present (Error code(s): T17).

ISIN is used at the beginning of Identification of Security (Subfield 1) and must be composed of uppercase letters only (Error code(s): T12).

USAGE RULES

When used in Description of Security (Subfield 2), codes must start and end with a slash '/'.

When an ISIN identifier is not used, one of the following codes must be used as the first characters of the Description of Security (Subfield 2):

[/2!a/]	The ISO two-digit country code, followed by the national scheme number.
[/TS/]	Followed by the ticker symbol.
[/XX/]	Bilaterally agreed or proprietary scheme which may be further identified by a code or short description identifying the scheme used.
[/4!c/]	Code identifying the type of security identifier used. This code must be one published by ISO 20022 (ExternalFinancialInstrumentIdentificationTypeCode).

MARKET PRACTICE RULES

When available, ISIN must be used.