CM - me thinks that this person may be an area type!
If so, I think it depends on the 5 yr rule. You must go to CATC and redo the licences in a refresher course.
That will of course cost money, and don't forget the SCRATCOH problem.
However, there are some who do it, at places such as Wycombe Air Park, and some fly on their ATPL's.
Tell us more, Baron!
B-L