Constitutional Court Procedure Act Article 3

(The Setting Up of Chambers and Their Composition and Presiding Justice)The Constitutional Court may set up several Chambers. Each Chamber shall consist of three Justices and exercise powers in accordance with this Act.The President and the Vice-President of the Judicial Yuan shall sit in and preside over one Chamber, respectively. Each of the other Chambers shall be presided over by the most senior Justice, or in the case of equal seniority, the eldest Justice, thereof.Chamber membership shall be altered every two years.
中文原文 憲法訴訟法第3條
憲法法庭得設數審查庭,由大法官三人組成之,依本法之規定行使職權。
審查庭審判長除由並任司法院院長、副院長之大法官擔任外,餘由資深大法官任之;資同由年長者任之。
各審查庭大法官之組成,每二年調整一次。

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