1.   Within 5 working days of receipt of a request for cooperation or exchange of information, the requested authority shall send an acknowledgement of receipt, by post or by electronic means, to the contact point designated pursuant to Article 2, unless otherwise specified in the request. The acknowledgement of receipt shall be made by using the form set out in Annex II and shall include, where possible, an indication of the estimated date or timeframe in which a reply is expected to be provided.

2.   Where it is not possible to indicate an estimated date or timeframe for the reply, the requested authority shall indicate the frequency with which it will update the requesting authority.