6. For the purposes of subsection (1) of section 21 (restrictions on financial promotion) a person with an interim permission is not to be treated as an authorised person for the purposes of communicating or approving the content of a communication except where the communication invites or induces a person to enter into (or offer to enter into) an agreement the making or the performance of which constitutes a controlled activity which corresponds to a regulated activity which is covered by his interim permission.