Regulations for Petitions against Discrimination against People Residing in the Taiwan Area Article 3

The petition shall be filed in writing by submitting a petition form or by transmitting an image file of the petition form via email, within one year from the day following the date on which the petitioner became aware of the infringement of rights due to discrimination. However, if more than five years have lapsed since the occurrence of the infringement, the petition shall not be accepted.For the purpose of calculating the time limit referred to in the preceding paragraph, the deadline shall be the date on which the competent authority receives the petition. Where the petition is submitted to the competent authority by registered mail, the deadline shall be the date shown on the postmark of the day of filing.
中文原文 居住臺灣地區之人民受歧視申訴辦法第3條
申訴之提起,應自知悉受歧視致權利受不法侵害之次日起一年內,以書面檢具申訴書或以電子郵件傳送申訴書影像檔方式為之。
但侵害發生已逾五年者,不得提起。
前項申訴之提起,以主管機關收受申訴書之日期為準。
但以掛號郵寄方式向主管機關提出者,以交郵當日之郵戳為準。

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