I think they could, but even if it matched the SCoutUS decision it could only apply going forward or it would be unconstitutional via Section 9.3 on barring ex

I think they could, but even if it matched the SCoutUS decision it could only apply going forward or it would be unconstitutional via Section 9.3 on barring ex post facto laws. Now if Congress were to pass a law saying not that something 100 years ago meant XYZ but that as of the sign date the reservation no longer exists, that might pass 9.3 but if that bill hits the courts, lower courts would need to reference this case and probably conclude that it isn't a correct application and ax it.