Notwithstanding any other provision of this Act, a supervisory authority acting as competent authority shall comply with requests from the Commission to limit or suspend decisions where -

(a) a proposed investment business firm which is the direct or indirect subsidiary of a parent governed by the law of a State which is not a Member State of the European Community seeks authorisation from the supervisory authority acting as a competent authority, or

(b) an undertaking which is governed by the law of a State which is not a Member State acquires a holding in any authorised investment business firm such that the latter would become its subsidiary.