All requests for information, acknowledgements of receipt and replies to requests for information referred to in Articles 3 and 4 shall comply with the following rules:

1. (a)

   they shall be in writing;

2. (b)

   they shall be sent by post or fax, or by an electronic means that is capable of ensuring the completeness, integrity and confidentiality of the information throughout the transmission process;

3. (c)

   they shall be addressed:

   1. (i)

      in the case of a request sent to a competent authority, to the contact person designated by the competent authority under Article 7;

   2. (ii)

      in the case of an acknowledgement of receipt or a reply sent to ESMA, to the contact point specified by ESMA in its request for information.