Regulations for the Approval and Management of Employment of Foreign Nationals by Embassies, Consulates, Foreign Offices, International Organizations, and their Personnel in the Republic of China (Taiwan) Article 9

The Ministry of Foreign Affairs may deny the application for the employment or employment extension of a foreign national by an embassy, consulate, foreign office, international organization, or its personnel thereof due to one of the following circumstances:1. A violation of the Act or these regulations.2. Failure to provide supplemental documents in a timely fashion after notification of the need to provide them because previously provided documents are unclear or fail to meet regulations.3. A serious violation of another law or regulation.4. The applicant has been denied a visa by the relevant authority and is thus prohibited from entering the country or required to leave the country within a certain time frame.
中文原文 駐華使領館外國機構國際組織及其人員聘僱外國人許可及管理辦法第9條
外交部對駐華使領館、外國機構、國際組織及其人員聘僱外國人或其展延之申請,有下列情形之一者,得不予許可:
一、違反本法或本辦法規定者。
二、檢具之文件記載不詳或不符規定,經通知補正,逾期未補正者。
三、違反其他法令情節重大者。
四、經有關機關拒絕簽證禁止入境或限令出境者。

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