Any information in the briefing notes should be incorporated within the written report and made public. That will put on file the basis upon which any decision was made and save arguments later. It's also good to have that available for the public to help explain how things came about. If there is information in the briefing note that is not fit for public consumption, the author needs to ask themselves why and if it's because an attempt is being made to influence members one way or another then that's predetermination.