Classified National Security Information Protection Act Article 23

When classified information is provided, replied or stated in accordance with the provisions set forth in the preceding two Articles or other Acts, each classified document shall indicate clearly which portions are classified with the applicable classification designation.
中文原文 國家機密保護法第23條
依前二條或其他法律規定提供、答復或陳述國家機密時,應先敘明機密等級及應行保密之範圍。

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