National Security Act Article 6

In order to ensure the safety of maritime defenses and military facilities and to maintain the law and order in mountainous areas, the Ministry of National Defense together with the Ministry of the Interior shall designate the coasts, mountainous areas, or important military installation areas to be classified areas and announced as control zones.People who enter and exit the control zones stated in preceding paragraph shall apply to the competent authority for permission.The control zones stated in preceding paragraph which are necessary for military may carry on the construction prohibition and restrictions; the extent of such construction prohibition, restriction shall be decided by the Ministry of National Defense together with the Ministry of Interior and the relevant authorities.The taxes on such lands with construction prohibition or restriction stated in preceding paragraph shall be reduced and exempted.