Intellectual Property Case Adjudication Act Article 12

A case as in Paragraph 1 of Article 10 is invalid unless the litigation is conducted by an agent ad litem, unless otherwise stipulated.For the filing of an action, appeal, motion, or interlocutory appeal, if no agent ad litem is appointed in accordance with the Paragraph 1 or 5 of Article 10, or if the one appointed in accordance with Paragraph 5 is deemed inappropriate by the court, the presiding judge shall order rectification be made within a prescribed time limit, and shall dismiss the action, appeal, motion, or interlocutory appeal by a ruling if no rectification is made within the prescribed time limit and no motion as in Paragraph 1 of the preceding article is made.The presiding judge shall first order rectification be made within a prescribed time limit if the defendant, appellee, or respondent fails to appoint an agent ad litem in accordance with Paragraph 1 or 5 of Article 10 or appoints one in accordance with Paragraph 5 that is deemed inappropriate by the Court.If a party rectifies in accordance with the preceding two paragraphs, its litigation is ratified by its agent ad litem with effect from the time of the litigation retroactively, and from the time of ratification if rectification is made beyond the prescribed time limit.
中文原文 智慧財產案件審理法第12條
第十條第一項事件,除別有規定外,應由訴訟代理人為訴訟行為,始生效力。
起訴、上訴、聲請或抗告,未依第十條第一項、第五項規定委任訴訟代理人,或雖依第五項規定委任,法院認為不適當者,審判長應定期間先命其補正;逾期未補正亦未依前條第一項為聲請者,法院應以裁定駁回之。
被告、被上訴人、相對人未依第十條第一項、第五項規定委任訴訟代理人,或雖依第五項規定委任,法院認為不適當者,審判長應先定期間命其補正。
當事人依前二項規定補正者,其訴訟行為經訴訟代理人追認,溯及於行為時發生效力;逾期補正者,自追認時起發生效力。

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