|  Option C |  4!a2!a2!c[3!c] |  (Identifier Code) | 
|  Option L |  35x |  (Party Identifier) | 
Conditional (see rule C2) in mandatory sequence A
This field specifies the instructing party ordering all transactions of the message.
Identifier Code must be a registered BIC (Error code(s): T27,T28,T29,T45).
This field must only be used when the instructing party is not also the ordering customer.