Certified Public Bookkeepers Act Article 14

For handling and transacting the authorized matters defined in Paragraph 1 of the preceding article, the certified public bookkeeper shall be authorized by the principal in writing, and shall submit said written authorization along with the authorized case to the appropriate authorities.The written authorization required by the preceding paragraph shall contain the following particulars:1.The respective names or titles, addresses of the principal and the agent, and the agent's serial number of the certificate of certified public bookkeeper;2.The substance of the authorized case, and the scope of authorization and power of the agent; and3.The date on which the authorization was given.
中文原文 記帳士法第14條
記帳士接受委任代理前條第一項各款業務,應與委任人訂立委任書,並將委任書隨同代理案件附送受理機關。
前項委任書應載明下列事項:
一、委任人與受委任人之姓名或名稱、地址及受委任人之證書字號。
二、委任案件內容及委任權限。
三、委任日期。

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