Mass unapprove BOMs

We are on Vantage 6.0 and are using the multi-plant module. One of
four plants is going to start inputing part specs on the VB form in
the part master which will print with the job traveler. Part of
this process is will be a BOM cleansing. Can we unapprove part
BOM's for just one plant? Some parts are used by than one plant.

Tom Ford
Cost Accountant
Mid-West Spring and Stamping