Can an interested party also reply to rule 17 questions directed to another interested party?

Interested parties may respond at their discretion to any of the listed questions should they wish to do so. The deadline for responses to the additional rule 17 questions is Tuesday 19 June 2012. If responses are not received by the 19 June 2012 the Examining Authority may disregard them.
The deadline for the written summaries of any case put at any of the hearings on 30 and 31 May 2012 and the applicant's final draft DCO is the 13 June 2012.