Land Expropriation Act Article 12

After failing to reach an agreement according to the provisions of the preceding article, a land use applicant may confer with and request the municipal or county (city) competent authority together with related persons to inspect or survey the interested public or private land or land improvements in case the applicant plans to apply for expropriation of land or land improvements. The owners, occupants, users or custodians may not refuse or interfere with the inspection or survey. However to inspect or survey a building or fenced off land for inspection or survey, the applicant shall notify the owners, occupants, users or custodians seven (7) days in advance.Where ground obstacles must be relocated or removed in order to conduct the inspection or survey mentioned in the preceding paragraph that results in damage to the owners or users, the land use applicant should make proper compensation to them as agreed through negotiation.
中文原文 土地徵收條例第12條
需用土地人經依前條規定協議不成時,為申請徵收土地或土地改良物之需,得洽請直轄市或縣(市)主管機關會同有關人員進入公、私有土地或土地改良物內實施調查或勘測,其所有權人、占有人、使用人或管理人不得拒絕或阻撓。
但進入建築物或設有圍障之土地調查或勘測,應於七日前通知其所有權人、占有人、使用人或管理人。
為實施前項調查或勘測,須遷移或拆除地上障礙物,致所有權人或使用人遭受之損失,應先予適當之補償,其補償價額以協議為之。

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