Urban Planning Act Article 27
When one of the following situations occurs, the concerned special municipality or county/city government , or township or county-administered city office shall take immediate action according to the circumstances and make changes to urban plans that have been announced and implemented:(1) When there is damage as a result of war, earthquakes, floods, typhoons, fires, or other critical incidents;(2) When measures need to be taken to prevent disasters;(3) When such changes are deemed necessary to facilitate national defense or economic development;(4) When such changes are deemed necessary to accommodate important construction projects operated by the central government, or a special municipality or county/city government.The Ministry of the Interior or county/city governments may designate the agency originally formulating the urban plan to complete the changes described in the preceding paragraph within a specified period. If necessary, the Ministry of the Interior, or concerned county/city governments may make the changes.
中文原文 都市計畫法第27條
都市計畫經發布實施後，遇有下列情事之一時，當地直轄市、縣（市）政府或鄉、鎮、縣轄市公所，應視實際情況迅行變更：
一、因戰爭、地震、水災、風災、火災或其他重大事變遭受損壞時。
二、為避免重大災害之發生時。
三、為適應國防或經濟發展之需要時。
四、為配合中央、直轄市或縣（市）興建之重大設施時。
前項都市計畫之變更，內政部或縣（市）政府得指定各該原擬定之機關限期為之，必要時，並得逕為變更。
一、因戰爭、地震、水災、風災、火災或其他重大事變遭受損壞時。
二、為避免重大災害之發生時。
三、為適應國防或經濟發展之需要時。
四、為配合中央、直轄市或縣（市）興建之重大設施時。
前項都市計畫之變更，內政部或縣（市）政府得指定各該原擬定之機關限期為之，必要時，並得逕為變更。