Regulations Governing Prevention of Gender-Related Incidents on Campuses Article 15

If there are two or more offenders and they work or study at different educational institutions, the first educational institution where one or more of the offenders works or studies that accepts an application for an investigation or an informant's report is the educational institution with jurisdiction and the other educational institutions involved shall send a representative to participate in the investigation.
中文原文 校園性侵害性騷擾或性霸凌防治準則第15條
行為人二人以上,分屬不同學校者,以先受理申請調查或檢舉之行為人所屬學校為事件管轄學校,相關學校應派代表參與調查。

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