Spatial Planning Act Article 18
When competent authorities of various levels need to enter public or private land or buildings to perform investigations or surveys in pursuit of the establishment or revision of spatial plans, the owners, occupants, managers or users of such properties may not refuse. However, to enter land and facilities that are used for national defense purposes, the consent of authorities with jurisdiction over such land and facilities shall be required.Personnel who enter public or private property for investigation or survey, as stated in the preceding paragraph shall present documentary proof or certificates and notify the owners, occupants, managers or users of the property seven days before entry.If certain obstacles must be removed or dismantled to conduct an investigation or survey, as referred to in the preceding paragraph, and doing so causes damage to the property of the owners or users, appropriate compensation shall be provided and the amount shall be decided by negotiation.
中文原文 國土計畫法第18條
各級主管機關因擬訂或變更國土計畫須派員進入公、私有土地或建築物調查或勘測時，其所有人、占有人、管理人或使用人不得拒絕。
但進入國防設施用地，應經該國防設施用地主管機關同意。
前項調查或勘測人員進入公、私有土地或建築物調查或勘測時，應出示執行職務有關之證明文件或顯示足資辨別之標誌；於進入建築物或設有圍障之土地調查或勘測前，應於七日前通知其所有人、占有人、管理人或使用人。
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。
但進入國防設施用地，應經該國防設施用地主管機關同意。
前項調查或勘測人員進入公、私有土地或建築物調查或勘測時，應出示執行職務有關之證明文件或顯示足資辨別之標誌；於進入建築物或設有圍障之土地調查或勘測前，應於七日前通知其所有人、占有人、管理人或使用人。
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。