The Implementation Regulations for Archives Stored on Microfilm Article 6

Classified archives and general archives shall be photographed on separate microfilms. When photographing classified archives, a classification mark and a proper warning shall be photographed at the beginning and the end of the microfilms.
中文原文 檔案微縮儲存管理實施辦法第6條
機密檔案與一般檔案應分別拍攝。
拍攝機密檔案時,應於微縮片之首幅及尾幅攝入機密標記及適切之警語。

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