The designated Representative of the NFL and the designated Representative of the NFLPA may present whatever documents, records, summaries, witnesses or any other arguments or evidence that they deem relevant to the Impartial Arbitrator’s inquiry. The Impartial Arbitrator is free to request additional information or live witness testimony, should he or she determine that such additional evidence is relevant and necessary to a decision. For purposes of clarity, the Parties agree that the Impartial Arbitrator shall have the power to compel a non-party witness to testify and/or produce documents if relevant to his/her inquiry. Any party that is the subject of the inquiry shall have the right to participate in the proceeding and to present a defense.