From the SafeSport arbitration documentation:
Generally, what happens at an Arbitration?
Typically, a Merits Arbitration looks a lot like a mini-trial. Each side will make an opening statement, present witnesses and evidence, and make closing statements. The Center has the burden to prove the misconduct more likely than not occurred, and that it imposed the appropriate sanction.
Who has to testify at a Merits Arbitration?
To ensure the arbitrator makes a fully informed decision, the Center seeks to provide the arbitrator with all relevant evidence, including testimonial and documentary evidence. To ensure the best presentation of the matter, this typically will include the testimony of the Claimant(s) and any relevant witnesses. The Center recognizes that it may be difficult for some Claimants to participate fully in an arbitration hearing and offers alternative methods of providing testimony, including participating in the arbitration through video conference rather than in person, and responding to questions from the arbitrator rather than from Respondent or Respondent’s counsel. A Claimant can discuss these and other options for participation with the Center’s counsel prior to an Arbitration. In some cases, if a Claimant chooses
not to participate in the Merits Arbitration (as is their right), the Center may determine that it cannot move forward without such testimony. In such cases, the Center may seek to withdraw its Decision until such time as a Claimant decides to participate.
Audible it is, then!