The Organization Act of the Toxic and Chemical Substances Bureau, Environmental Protection Administration, Executive Yuan Article 4

The Bureau shall have one chief secretary of the rank of senior grade 11.
中文原文 行政院環境保護署毒物及化學物質局組織法第4條
本局置主任秘書,職務列簡任第十一職等。

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