Jeff,

I found an explanation for your question in the TSM Admin Guide for AIX,
pages 244-250.   In general, rebinding is done for backup versions if any of
the following applies:

1. The user changes the management class specified in the include-exclude
list and does a backup.
2. An admin activates a policy set in the same policy domain as the client
node and the policy set does no contain a management class with the same
name as the management class to which a file is currently bound.
3. An administrator assigns a client node to a different policy domain, and
the active policy set in that policy domain does not have a management class
with the same name.

The inactive versions will be rebound to the associated management class of
the next backup.

Hope this helps.

Jack Musselman