(a) co-operate with the competent authorities of other Member States designated under EU prospectus law whenever necessary for the purpose of performing its functions, and
(b) render assistance to competent authorities of other Member States in the performance of their functions under EU prospectus law.
(2) In particular and without prejudice to the generality of paragraph (1), the Bank shall -
(a) exchange information and cooperate with competent authorities in other Member States when an issuer has more than one home competent authority because of its various classes of securities, or where the function of approving a prospectus has been transferred to the competent authority of another Member State pursuant to Regulation 40,
(b) closely cooperate with competent authorities in other Member State when requiring suspension or prohibition of trading for securities traded in various Member States in order to ensure (in so far as practicable) equivalent treatment