3. Where, after an opinion is submitted pursuant to paragraph 2, the non-financial supervisor in charge of the parent undertaking of a group or of the head office of an obliged entity still considers that it is not necessary to set up a college, Member States shall ensure that the other non-financial supervisors are able to set up the college, provided that it is composed of at least two members. In those cases, those non-financial supervisors shall decide among them who is the supervisor in charge of the college. The non-financial supervisor in charge of the parent undertaking of a group or of the head office of an obliged entity shall be informed of the activities of the college and be able to join the college at any time.