The petition review session took place at the Army Headquarters located in the central city of Gyeryong, which was also attended by Byun, an Army officer said, adding that the seven-member panel is to make a judgment after this session.
"But the decision will not be made public at least until it is delivered to Byun," another officer said. "We are supposed to notify the former officer of the result within 15 days."
Byun earlier said if the petition is rejected, she will bring her case to court, according to the Military Human Rights Center.
Byun was the first South Korean active-duty officer to have sex reassignment surgery while in service. Currently, no specific regulations exist on how to handle cases of soldiers who have sex reassignment operations while in service.