393.This Part confers power on the Authority and, in certain cases, the DGFT to intervene in the business of EEA and Treaty firms who are, or have been, authorised by virtue of Schedules 3 and 4.  These firms are referred to in the Part as “incoming firms”.  This power, which is referred to as the power of intervention, does not apply in respect of persons who are authorised solely by virtue of having a permission under Part IV.  Nor does it apply in respect of the additional Part IV permissions that may be held by incoming firms.  The Part sets out the grounds on which the power is exercisable and the procedures for exercising it.
Commentary on Sections Part Xiii: Incoming Firms: Intervention by Authority