Code of Civil Procedure Article 328
The person who has special knowledge or experience needed for giving expert testimony or who has been commissioned by a government agency to perform the function of giving expert opinion is under a duty to give expert testimony in an action between others.
中文原文 民事訴訟法第328條
具有鑑定所需之特別學識經驗，或經機關委任有鑑定職務者，於他人之訴訟，有為鑑定人之義務。