Mandatory
This field contains a reference common to both the Sender and the Receiver.
This field consists of the bank and location codes (Error code(s): T95) (from the ISO Bank Identifier Code) of both the Sender and the Receiver of the MT 303. These codes must appear in alphabetical order (letters take precedence over numbers) (Error code(s): T96).
Location Code 1 and Bank Code 2 will be separated by a four digit Reference Code. Reference Code is a number based on either field 36 in sequence B if field 94A in sequence A is FORX or field 36A in sequence C if field 94A in sequence A is FXOP. If there are no digits to the left of it, the space must be zero filled (Error code(s): T22).