It may seem a bit insignificant at first, but useful for managing the Duty Roster.
The list of duty officers available for exchange doesn't show the bound icon when you are talking to the Personnel Officer (who does not appear to have a name) at the Academy.
You need to keep exiting out of the list of duty officers available for exchange to check the Roster, because it doesn't show the bound icon in the exchange duty officer list.
It's helpful to get rid of bound Uncommon and Rare Duty Officers so you can move in Very Rare or better Duty Officers.