Enforcement Act of the Code of Civil Procedure Article 3

The regulations governing service of litigation papers by postal service institutions shall be prescribed jointly by the Judicial Yuan and the Executive Yuan.
中文原文 民事訴訟法施行法第3條
郵務機構送達訴訟文書實施辦法,由司法院會同行政院訂定之。

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