Act for Settlement of Labor-Management Disputes Article 53

Industrial dispute actions cannot be undertaken unless a mediation of labor-management dispute is not successfully concluded; for the rights dispute, strike is not allowed.If the Central Competent Authority decides that an employer or employer organization is in violation of Article 35 of the Labor Union Act or Paragraph 1 to Article 6 of the Collective Agreement Act, the labor union may undertake industrial dispute actions in accordance with the Act.
中文原文 勞資爭議處理法第53條
勞資爭議,非經調解不成立,不得為爭議行為;權利事項之勞資爭議,不得罷工。
雇主、雇主團體經中央主管機關裁決認定違反工會法第三十五條、團體協約法第六條第一項規定者,工會得依本法為爭議行為。

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