Code of Civil Procedure Article 332

A motion to reject an expert witness shall specify the supporting reasons to the court or the judge who appoints such expert witness.A preliminary showing shall be made with regard to the reasons provided in the preceding paragraph and the facts provided in the proviso of the second paragraph of the preceding article.
中文原文 民事訴訟法第332條
聲明拒卻鑑定人,應舉其原因,向選任鑑定人之法院或法官為之。
前項原因及前條第二項但書之事實,應釋明之。

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