The Servicemember Relief Act Article 28

Other than the withdrawal of a petition, which shall not be granted without an exceptional retention, the petition agent is authorized to conduct all petition acts on behalf of the petitioner vis-a-vis the matters that it is retained for.Whereas there are two or more petition agents, every one of them may act independently on behalf of the petitioner.A petition agent may still represent the petitioner independently despite the retention not complying with the rules stipulated in the preceding paragraph.Any factual statement made by a petition agent shall not be effective if such statement is revoked or rectified immediately by the petitioner appearing in person.The power and authorization of the petition agent shall not terminate due to the decease, bankruptcy, or loss of petition capacity of the represented petitioner, nor shall it terminate due to the replacement of the statutory agent of the represented petitioner.
中文原文 軍人權益事件處理法第28條
復審代理人就其受委任之事件,得為一切復審行為。
但撤回復審,非受特別委任不得為之。
復審代理人有二人以上者,均得單獨代理復審人。
違反前項規定而為委任者,其復審代理人仍得單獨代理。
復審代理人事實上之陳述,經到場之復審人本人即時撤銷或更正者,不生效力。
復審代理權不因復審人本人死亡、破產、喪失復審能力或法定代理變更而消滅。

English translation for reference only; the Chinese text prevails. Not legal advice.