Regulations Governing Professional Engineer Certification for Public Constructions Article 9

A professional engineer shall, while rendering the certification services, pursuant to Article 16 of the Act, sign and affix professional practice seal on the drawings and papers.
中文原文 公共工程專業技師簽證規則第9條
技師執行簽證時,應依本法第十六條規定於所製作之圖樣、書表及簽證報告上簽署,並加蓋技師執業圖記。

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