Constitutional Court Procedure Act Article 6

(Parties)Reference to parties in this Act refers to petitioners and respondents in cases governed by:(1) Chapter III (constitutionality of laws and constitutional complaints): the highest state organ, the Legislators, the court, and the person lodging a petition; (2) Chapter IV (disputes between constitutional organs): the petitioning highest state organ and the respondent organ;(3) Chapter V (impeachment of the President or the Vice President): the petitioning impeaching authority and the impeached;(4) Chapter VI (dissolution of unconstitutional political parties): the petitioning authority and the respondent political party;(5) Chapter VII (local self-government): the petitioning local self-government body or the petitioning legislative or executive authorities thereof; or(6) Chapter VIII (uniform interpretation of statutes and regulations): the person lodging a petition.The competent authorities in charge of the impugned laws or the authorities otherwise designated by the Constitutional Court shall be regarded as the respondent under the preceding Paragraph.
中文原文 憲法訴訟法第6條
本法所稱當事人,係指下列案件之聲請人及相對人:
一、第三章案件:指聲請之國家最高機關、立法委員、法院及人民。
二、第四章案件:指聲請之國家最高機關,及與其發生爭議之機關。
三、第五章案件:指聲請機關及被彈劾人。
四、第六章案件:指聲請機關及被聲請解散之政黨。
五、第七章案件:指聲請之地方自治團體或其立法、行政機關。
六、第八章案件:指聲請之人民。
受審查法規範之主管機關或憲法法庭指定之相關機關,視為前項之相對人。

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