As much of a stink I have put up in the past...about no original members in a group...it would seem to me this "law" would pertain to groups that do not have the legal right to the “name”…and we all know that Bob Shane owns the name “The Kingston Trio”…
I can see the disclaimer now…
“In Concert, One Night Only—the Kingston Trio”…then in small print…no actual members of Kingston Trio will appear…