Regulations on Technician Skills Certification and Issuance of Certificates Article 5
The rank for job categories of skills certification may be divided into Class A, Class B, and Class C; job categories unsuitable to be divided into three classes may have single class.
中文原文 技術士技能檢定及發證辦法第5條
技能檢定職類分為甲、乙、丙三級，不宜分三級者，定為單一級。