Code of Civil Procedure Article 258
The decision allowing the amendment or addition of the claim in accordance with the proviso of the first paragraph of Article 255, or determining that there is no amendment or addition, is not reviewable.Where a ruling denying the addition of claims becomes final and binding by reason of a failure to meet the relevant requirements, the plaintiff may, within ten days from the day when the ruling becomes final and binding, move the court to adjudicate such additional claim.
中文原文 民事訴訟法第258條
法院因第二百五十五條第一項但書規定，而許訴之變更或追加，或以訴為非變更或無追加之裁判，不得聲明不服。
因不備訴之追加要件而駁回其追加之裁定確定者，原告得於該裁定確定後十日內聲請法院就該追加之訴為審判。
因不備訴之追加要件而駁回其追加之裁定確定者，原告得於該裁定確定後十日內聲請法院就該追加之訴為審判。