(a) The presiding officer receives all testimony and exhibits that are
relevant to the issues of the hearing. So far as possible, each party
shall submit enough copies of his exhibits that the presiding officer may
keep three copies for the FAA and give one to each other party.
(b) The presiding officer excludes any testimony that is irrelevant,
unduly repetitious, or consists of statements made during an aeronautical
study in an effort to reconcile or compromise aviation or construction or
alteration requirements. A party to the hearing may object to the
admission of evidence only on the ground that it is irrelevant.