Enforcement Rules of Sewerage Act Article 11

The landowner, possessor or user shall not change the existing sewer pipes or other facilities on public or private land without obtaining approval from the authority in charge.
中文原文 下水道法施行細則第11條
在公、私有土地內既有之下水道管渠或其他設施,非經主管機關核准,土地所有人、占有人或使用人不得變更。

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