Yes, anyone considering recovering a wrecked warbird must jump though all the goverment paperwork first.
Then the paperwotk for the "host" country if outside the US.
The NAVY took a few recovered aircraft that did not have the paperwork done.
The old "frankensteins' monster"syndrome, once you wake it up................
In aviaiton school, we had to scrap several restorable aircraft that the military donated for training, as they could not be resold afterwards.
Darryl Greenemyer built and flew a F-104 from scrap parts! (Then crashed it with a NAVY loaner J79 engine!)