Code of Civil Procedure Article 67-1

The court may, at an appropriate time prior to the conclusion of oral-argument in the first or second instance, serve a written notice of the action and the phase reached to a third party who is legally interested in the outcome of such action.The third party notified in accordance with the provision of the preceding paragraph may file, within five days of service of the notice, the motion provided in the first paragraph of Article 242.Wherever the third party notified in accordance with the provision of the first paragraph is qualified to intervene in accordance with the provision of Article 58, the provision of the preceding Article shall apply mutatis mutandis.
中文原文 民事訴訟法第67-1條
訴訟之結果,於第三人有法律上利害關係者,法院得於第一審或第二審言詞辯論終結前相當時期,將訴訟事件及進行程度以書面通知該第三人。
前項受通知人得於通知送達後五日內,為第二百四十二條第一項之請求。
第一項受通知人得依第五十八條規定參加訴訟者,準用前條之規定。

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