Administrative Litigation Act Article 188

Unless otherwise provided, a decision of an administrative litigation shall be based on the parties' oral arguments.For a judge who did not participate in the oral argument session on which a decision is based, he/she may not participate in making the decision.A ruling may be made without oral argument session.Unless otherwise provided, where a ruling is made without oral argument session, the court may order the persons who have interests in the litigation to present their statements in writing or oral.
中文原文 行政訴訟法第188條
行政訴訟除別有規定外,應本於言詞辯論而為裁判。
法官非參與裁判基礎之辯論者,不得參與裁判。
裁定得不經言詞辯論為之。
裁定前不行言詞辯論者,除別有規定外,得命關係人以書狀或言詞為陳述。

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