modify any provision of this Act which is an applicable provision (within the meaning of paragraph 13 or 14) in its application to an EEA firm qualifying for authorisation;

make provision as to any change (or proposed change) of a prescribed kind relating to an EEA firm or to an activity that it carries on in the United Kingdom and as to the procedure to be followed in relation to such cases;

provide that the Authority may treat an EEA firm’s notification that it is to cease to carry on regulated activity in the United Kingdom as a request for cancellation of its qualification for authorisation under this Schedule.