Attorney Regulation Act Article 29

An attorney shall not engage in any lawsuits in any court where he/she is related as husband and wife, or blood relations within the fifth level, or matrimonial relatives within the third level to the Head of the Court.Where an attorney and the Chief Prosecutor have any familial relationship stated in the preceding paragraph, such attorney shall not engage in any criminal lawsuits in such prosecutors' office and the corresponding court, neither shall he/she engage in any civil lawsuits in which the prosecutors' office or the prosecutor is a party or a participant.An attorney should recuse himself/herself from acting as legal representative in any lawsuit where he/she has the familial relationship set forth in Paragraph 1 hereof with the judge, prosecutor, judicial associate officer, judicial associate officer, judicial police officer or judicial police involved with such lawsuit.
中文原文 律師法第29條
律師與法院院長有配偶、五親等內血親或三親等內姻親之關係者,不得在該法院辦理訴訟事件。
律師與檢察署檢察長有前項之親屬關係者,不得在該檢察署及對應配置之法院辦理刑事訴訟案件及以檢察署或檢察官為當事人或參加人之民事事件。
律師與辦理案件之法官、檢察官、司法事務官、檢察事務官、司法警察官或司法警察有第一項之親屬關係且受委任在後者,應行迴避。

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