Air Pollution Control Act Article 5
The central competent authority shall delineate and officially announce each class of special municipality, county and city control region based on the demands placed upon air quality by land use or air quality conditions.The control regions in the preceding paragraph shall be divided into the following three classes.1.Class 1 control regions: Class 1 control regions refer to such areas as national parks and nature protection and conservation areas that are delineated in accordance with the law.2.Class 2 control regions: Class 2 control regions refer to the areas that meet air quality standards, with the exception of Class 1 control regions.3.Class 3 control regions: Class 3 control regions refer to the areas that do not meet air quality standards, with the exception of Class 1 control regions.The central competent authority in consultation with relevant agencies shall determine the air quality standards in the preceding paragraph and shall review them at least every four years.
中文原文 空氣污染防制法第5條
中央主管機關應視土地用途對於空氣品質之需求或空氣品質狀況劃定直轄市、縣（市）各級防制區並公告之。
前項防制區分為下列三級：
一、一級防制區：國家公園及自然保護（育）區等依法劃定之區域。
二、二級防制區：一級防制區外，符合空氣品質標準之區域。
三、三級防制區：一級防制區外，未符合空氣品質標準之區域。
前項空氣品質標準，由中央主管機關會商有關機關定之，並應至少每四年檢討一次。
前項防制區分為下列三級：
一、一級防制區：國家公園及自然保護（育）區等依法劃定之區域。
二、二級防制區：一級防制區外，符合空氣品質標準之區域。
三、三級防制區：一級防制區外，未符合空氣品質標準之區域。
前項空氣品質標準，由中央主管機關會商有關機關定之，並應至少每四年檢討一次。