Administrative Litigation Act Article 227
If a settlement between the parties and a third party is invalid, or grounds exist for revoking such a settlement, a litigation may be initiated in the original administrative court seeking a declaratory judgment that the settlement is invalid or to seek a judgment to revoke the settlement.For the situation referred to in the preceding Paragraph, a party to the litigation may move to consolidate the adjudication of the aforesaid litigation with that of the original litigation.
中文原文 行政訴訟法第227條
當事人與第三人間之和解，有無效或得撤銷之原因者，得向原行政法院提起宣告和解無效或撤銷和解之訴。
前項情形，當事人得請求就原訴訟事件合併裁判。
前項情形，當事人得請求就原訴訟事件合併裁判。