Move PL under another EIN

Currently we have several EIN's and process levels.  And I have set up many new PL's in the past several years in Lawson; but this is the first time I need to know if it is possible that we could just "move" an existing PL from being under one head EIN to being under another existing head EIN.  If this is possible; the first of the year would have to be the time so that the moved PL is under only 1 EIN for the full tax reporting year.  One concern I have is that there is no date on this move in the PR09.  Running any tax reporting out of history would seem a problem.  Or would creating a new PL all together be the thing to do?  Anyone else ever done this? Have any advice?