These Enforcement Rules are determined pursuant to Article 99 of the Air Pollution Control Act (herein referred to as "this Act").

The types of air pollutants designated in Article 2, subparagraph 1 of this Act are as follows.
1. Gaseous pollutants:
a. Sulfur oxides (SO2 and SO3 are collectively termed SOx)
b. Carbon monoxide (CO)
c. Nitrogen oxides (NO and NO2 are collectively termed NOx)
d. Hydrocarbons (CxHy)
e. Hydrogen chloride (HCl)
f. Carbon disulfide (CS2)
g. Halogenated alkenes (CmHnXx)
h. Chlorofluorocarbons (CFCs)
i. Volatile organic compounds (VOCs)
2. Particulate pollutants:
a. Total suspended particulates: Means particles suspended in the air
b. Suspended particulates: Means particles with a diameter of less than 10 microns (μm)
c. PM2.5: Means particles less than 2.5 microns (μm) suspended in the air
d. Dustfall: Means particles with a diameter exceeding 10 microns (μm) that can settle due to the force of gravity
e. Metal fumes and compounds thereof: Means particles containing metals or metal compounds
f. Black smoke: Means dark gray to black smoke containing carbon particles as its main component
g. Acid mist: Means aerosol mists containing sulfuric acid, nitric acid, phosphoric acid or hydrochloric acid, etc.
h. Oily smoke: Means smoke containing hydrocarbons
3. Secondary pollutants:
a. Photochemical smog: Means particulates derived from photochemical reactions that are suspended in the air and impair vision
b. Photochemical peroxided compounds: Means strongly oxidizing substances derived from photochemical reactions, including ozone and peroxyacetyl nitrate (PAN), etc. (able to free iodine from neutral potassium iodide solution, but not including NO2)
4. Hazardous air pollutants:
a. Fluorides
b. Chlorine gas (Cl2)
c. Ammonia gas (NH3)
d. Hydrogen sulfide (H2S)
e. Formaldehyde (HCHO)
f. Gases containing heavy metals
g. Gaseous sulfuric acid, nitric acid, phosphoric acid or hydrochloric acid
h. Vinyl chloride monomer (VCM)
i. Polychlorinated biphenyls (PCBs)
j. Hydrogen cyanide (HCN)
k. Dioxins and furans
l. Carcinogenic polycyclic aromatic hydrocarbons
m. Carcinogenic VOCs
n. Asbestos and matter containing asbestos
5. Odor pollutants: Means pollutants with an odor sufficient to cause disgust or other adverse emotional reactions
6. Other substances designated by the central competent authority

The motor vehicles designated in Article 3, subparagraph 3 of this Act shall be classified as follows in accordance with air pollution control requirements:
1. Motor vehicles with gasoline and clean alternative fuel engines
2. Motor vehicles with diesel and clean alternative fuel engines
3. Motorcycles

The matters designated in this Act as the responsibility of the central competent authority are as follows:
1. Planning, determination, supervision and implementation of national air pollution control policies, programs and plans
2. Determination, deliberation and interpretation of national air pollution control laws and regulations
3. Implementation of national air quality monitoring, provision of monitoring data, and determination of monitoring quality assurance and quality assurance standards
4. Forecasting of air quality deterioration trends, announcement of data, and counseling and supervision of air quality deterioration emergency controls
5. Planning, coordination, integration and supervision of control targets, methods, implementation steps, and timetables for special municipalities, counties and cities in total quantity control regions
6. Issuing permits for and management of air pollutant testing and analysis organizations
7. Supervision and management of motorcycle air pollutant emission testing stations
8. Supervision and management of unscheduled motor vehicle air pollutant emission testing stations
9. New vehicle type air pollutant emission inspection and new vehicle sampling and testing
10. Emission inspection or assessment of stationary pollution sources and mobile pollution sources
11. Supervision, counseling and verification of air pollution control and monitoring by special municipality, county and city competent authorities
12. Coordination or implementation of air pollution control involving two or more special municipalities, counties and cities
13. Compilation of annual national air pollution control reports
14. Promotion and coordination of global atmospheric quality protection
15. Air pollution control international cooperation, research and development, public awareness, and personnel training and management
16. Management of dedicated air pollution control personnel and dedicated health risk assessment personnel placement
17. Other national air pollution control matters

The matters designated in this Act as the responsibility of special municipality, county and city competent authorities are as follows:
1. Planning, determination and implementation of special municipality, county or city air pollution control programs and plans
2. Determination and interpretation of special municipality, county and city air pollution control laws and regulations
3. Monitoring of special municipality, county and city air quality, monitoring of quality assurance, issuance of air quality deterioration warnings, and implementation of emergency control measures
4. Special municipality, county and city air pollution control work, promotion of total quantity control measures, and coordination of dispute resolutions
5. Checking of air pollution control fees and tracking of payments
6. Regulatory listing of stationary pollution sources, checking, updating, and filing of air pollutant emission data, checking of establishment or operating permit content, and approval and functionality checking of fully established continuous automated monitoring facilities
7. Auditing of reported records and statistical analysis of connection data from public and private premises
8. Air pollutant emissions inspection and assessment of stationary pollution sources and mobile pollution sources
9. Implementation of motorcycle air pollutant emission inspection tasks within the jurisdiction and the approval and management of inspection stations
10. Implementation of unscheduled motor vehicle air pollutant emission inspection tasks within the jurisdiction and the approval and management of inspection stations
11. Production and reporting of air pollution control statistical data of special municipalities, counties and cities
12. Research and development, advocacy, and personnel training and lectures on air pollution control in special municipalities, counties and cities
13. Management of dedicated air pollution control personnel and dedicated health risk assessment personnel placement
14. Other special municipality, county and city air pollution control matters