Vital Area Regulations Article 1
Tactical locations, military ports and airports which are of such importance that they must be retained or controlled for the purposes of national defense are called key points. Key points, together with their surrounding areas including any body of water, are defined as a vital area.
中文原文 要塞堡壘地帶法第1條
國防上所必須控制與確保之戰術要點、軍港及軍用飛機場，稱為要塞堡壘；要塞堡壘及其周圍之必要區域（含水域），稱為要塞堡壘地帶。