Organic Act of the Environmental Protection Administration, Executive Yuan Article 20

The applicable duty series of personnel in articles 13 through 17 with a specified official rank shall be selected as prescribed in Article 8, of the Civil Service Employment Act.
中文原文 行政院環境保護署組織條例第20條
第十三條至第十七條之一所定列有官等職等人員,其職務所適用之職系,依公務人員任用法第八條之規定,就有關職系選用之。

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