4 CFR §28.57

1. (a)Hearings shall be open to the public. However, the administrative judge at their discretion, may order a hearing or any part thereof closed, where to do so would be in the best interests of the petitioner, a witness, the public, or other affected persons. Any order closing the hearing shall set forth the reasons for the administrative judge's decision. Any objections thereto shall be made a part of the record.
2. (b)At the hearing, the petitioner, the petitioner's representative, GAO's legal representative, and a GAO management representative, who is not expected to testify, each have a right to be present. The Agency management representative shall be designated prior to the hearing.