Act for Implementation of J.Y. Interpretation No. 748 Article 16

I. A union as stated in Article 2 can be terminated by mutual agreement of the parties.II. The termination provided in the preceding paragraph shall be effected in writing, requiring the signatures of at least two witnesses and by registering termination at the Household Administration Bureau.
中文原文 司法院釋字第七四八號解釋施行法第16條
第二條關係得經雙方當事人合意終止。
前項終止,應以書面為之,有二人以上證人簽名並應向戶政機關為終止之登記。

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