Used to identify the source of the AllocAccount code.
See AcctIDSource (660) for description.
Valid values:
| '1' | BIC |
| '2' | SID code |
| '3' | TFM (GSPTA) |
| '4' | OMGEO (AlertID) |
| '5' | DTCC code |
| '99' | Other (custom or proprietary) |
Used in: