Half-mast Implementation Regulations Article 7

After the approval of half-mast described in Articles 4.1 and 5, the Executive Yuan shall notify the relevant authorities, which shall require their own offices (bodies), public schools, or local government facilities to fly the national flag at half-mast according to these regulations.
中文原文 國旗下半旗實施辦法第7條
第四條第一項各款及第五條下半旗決定後,由行政院通函相關機關轉知所屬機關(構)、公立學校或所轄地方政府依本辦法規定辦理。

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