Enforcement Rules of the Labor Standards Act Article 15

The arrear wages referred to in subparagraph 1, Paragraph 1 of Article 28 of the Act shall be limited to wages owed within six months prior to suspension, liquidation or bankruptcy declaration of the employer’s business.
中文原文 勞動基準法施行細則第15條
本法第二十八條第一項第一款所定積欠之工資,以雇主於歇業、清算或宣告破產前六個月內所積欠者為限。

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