Land Act Article 44-1

When cadastral survey is carried out, landowners shall set up border marks and permanently preserve them thereafter.Rules governing the types, dimensions and methods of the setting up of border marks, and the trade and management of border marks, shall be formulated by the Central Land Administration.
中文原文 土地法第44-1條
地籍測量時,土地所有權人應設立界標,並永久保存之。
界標設立之種類、規格、方式與其銷售及管理等事項之辦法,由中央地政機關定之。

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