Teacher Remuneration Act Article 12

Promotion of the salary grade of any public secondary school teacher will be carried out in accordance with the Regulations Governing Teacher Performance Evaluation at the Public Senior Secondary School Level or Below.The teaching, research, counseling, and service of a public tertiary school teacher who has served in their position for one full academic year will be assessed for that academic year by their school; based on the results of such assessments, the school may promote the teacher's base salary (or seniority salary) one grade, up to no higher than the highest seniority salary allowed for the professional level for which they were hired.For teachers at private primary and secondary schools, methods for promotion in salary grades may be adopted by each school, in addition to performance evaluations and promotions following the model in the Regulations Governing Teacher Performance Evaluation at the Public Senior Secondary School Level or Below. Methods for promotion in salary grades for teachers at private tertiary schools may be adopted by each school following the model in the preceding paragraph.
中文原文 教師待遇條例第12條
公立中小學教師薪級之晉級,依公立高級中等以下學校教師成績考核辦法規定辦理。
公立大專教師服務滿一學年,由學校按學年度評定其教學、研究、輔導、服務等成績,並得依評定結果晉本薪(年功薪)一級,至所聘職務等級最高年功薪為限。
私立中小學教師薪級之晉級,除考核年度、晉級方式比照公立高級中等以下學校教師成績考核辦法規定辦理外,由各校定之;私立大專教師薪級之晉級,由各校比照前項規定定之。

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