If the restorers are to be reworking the area of its' placement, Yep, I sure would!
And I understand the argument of it not having ever being separated from the chassis; and the possible violation of the: "removal of", "installation of", or "to tamper with" of the V.I.N. tag laws.
But I also sure would do my homework on the proper (reasonably) attaching devices (rivets) for the re-installation process, not for the purpose of being deceptive, but rather just to provide the proper presentation, as I have witnessed a lot of different examples with even instances of two different rivets on a single installation.
Scott.