Constitutional Court Procedure Act Article 9
(Grounds for Disqualification Sua Sponte)A Justice must recuse herself or himself sua sponte from the conduct of the proceedings, where (1) she or he, her or his spouse, former spouse, or fiance is a party to the case; (2) she or he is or was a party's statutory agent, representative; she or he is the head or a member of the party's household, or the party's relative within the third degree of consanguinity or within the second degree of affinity;(3) she or he has previously given evidence or acted as an expert witness in the case;(4) she or he has previously taken part in the making of the relevant court decision or arbitration award that underlies the case;(5) she or he has previously taken part in the petition stage of the case in her or his official capacity of the time;(6) she or he has previously served as the advocate or the defense counsel in the case; or(7) in the case that the relevant Justice was a practicing attorney, other colleagues of her or his law firm then served as the advocate or the defense counsel in the case.
中文原文 憲法訴訟法第9條
大法官有下列情形之一者，應自行迴避，不得執行職務：
一、大法官或其配偶、前配偶或訂有婚約者，為聲請案件當事人。
二、大法官現為或曾為聲請案件當事人之法定代理人、代表人、家長、家屬、三親等內之血親或二親等內之姻親。
三、大法官曾為聲請案件之證人或鑑定人。
四、大法官曾參與原因案件之裁判或仲裁判斷。
五、大法官曾因執行職務而參與該案件之聲請。
六、大法官曾為聲請案件之訴訟代理人或辯護人。
七、大法官於執行律師業務期間，其同事務所律師為該聲請案件之訴訟代理人或辯護人。
一、大法官或其配偶、前配偶或訂有婚約者，為聲請案件當事人。
二、大法官現為或曾為聲請案件當事人之法定代理人、代表人、家長、家屬、三親等內之血親或二親等內之姻親。
三、大法官曾為聲請案件之證人或鑑定人。
四、大法官曾參與原因案件之裁判或仲裁判斷。
五、大法官曾因執行職務而參與該案件之聲請。
六、大法官曾為聲請案件之訴訟代理人或辯護人。
七、大法官於執行律師業務期間，其同事務所律師為該聲請案件之訴訟代理人或辯護人。