Revision level in PO

Hi ,

If we maintain revision level for the material in material master and there is a PO for this material. If we change now revision level from 1 to 2 for this part. Does this revision level 2 is reflected in PO?. If it is reflected, then how the revision level 2 is displayed directly? or the PO displays only he current rev of the material master regardless of what the rev was when the PO was created and communicated to the supplier.

Thanks