Administrative Appeal Act Article 73

The agency with jurisdiction of administrative appeal may by its ex officio or according to the administrative appellant or intervenor appellant’s application command a third party to present the document or other items, the agency may take custody of such document or item.The agency with jurisdiction of administrative appeal may get a document or other items under the custody of an official or a government agency.Unless the contents commanded by the agency with jurisdiction of administrative appeal as stipulated in last Paragraph is against the national secrecy, the official or government agency shall not refuse to present it.
中文原文 訴願法第73條
受理訴願機關得依職權或依訴願人、參加人之申請,命文書或其他物件之持有人提出該物件,並得留置之。
公務員或機關掌管之文書或其他物件,受理訴願機關得調取之。
前項情形,除有妨害國家機密者外,不得拒絕。

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