When the message is used to advise the status of a cancellation of an MT 502 Order to Buy or Sell, 513 Client Advice of Execution, 514 Trade Allocation Instruction, 515 Client Confirmation of Purchase or Sale, or 518 Market-Side Securities Trade Confirmation, Field 20C Reference in subsequence A1 Linkages must contain the reference of the cancellation request.
When the message is used to advise the status of a replacement of an MT 502 Order to Buy or Sell, Field 20C Reference in subsequence A1 Linkages must contain the reference of the replacement request.
When the message is used to advise the status of an MT 502 Order to Buy or Sell, Field 20C Reference in subsequence A1 Linkages must contain the reference of the order.
