USAGE RULES

Number specifies the number of days.

These two fields together enable the Receiver of the message to know when all the allocation instructions associated with one block trade have been received. The master reference must be present in the linkage sequence.

When cancelling allocations the Function of the Message field must contain CANC and both the master reference and the original Sender's reference must be present in the linkage sequence for each allocation. A separate Current Allocation/Total Number series must be used and not the original allocation numbers.

The replacement allocations must contain NEWM in field 23G Function of the Message and the master reference must be present in the linkage sequence. A separate Current Allocation/Total Number series must be used and not the original series.

For example, a block trade may be made up of 100 allocations. Five of these may be cancelled and replaced by three new ones. The Allocation Number/Total Number fields in the five cancellations must contain 1/5, 2/5, 3/5, 4/5, and 5/5 respectively. Similarly, the Allocation Number/Total Number fields in the three new allocations must contain 1/3, 2/3, and 3/3 respectively.