Gender Equality in Employment Act Article 14

(Ⅰ)Female employee having difficulties in performing her work during menstruation period may request one day menstrual leave each month. If the cumulative menstrual leaves do not exceed three days in a year, said leaves shall not be counted toward days off for sick leave. All additional menstrual leaves shall be counted toward days off for sick leave.(Ⅱ)Wages for menstrual leaves, whether said leaves are sick leaves or non-sick leaves as prescribed in the preceding Paragraph, shall be half the regular wage.
中文原文 性別工作平等法第14條
女性受僱者因生理日致工作有困難者,每月得請生理假一日,全年請假日數未逾三日,不併入病假計算,其餘日數併入病假計算。
前項併入及不併入病假之生理假薪資,減半發給。

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