Enforcement Rules for State Compensation Law Article 9

Where there are two or more agents, each may act on behalf of the claimant independently. Authorization in violation with the preceding paragraph has no effect on the liable compensating authority.
中文原文 國家賠償法施行細則第9條
委任代理人有二人以上者,均得單獨代理請求權人。
違反前項之規定而為委任者,對於賠償義務機關不生效力。

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