Air pollution control agency

Air pollution control agency means any of the following:
(1) A single State agency designated as the official State air pollution control agency;
(2) An agency established by two or more States and having substantial powers or duties pertaining to the prevention and control of air pollution;
(3) A city, county, or other local government health authority or, in the case of any city, county, or other local unit of government in which there is an agency other than the health authority charged with responsibility for enforcing ordinances or laws relating to the prevention and control of air pollution, such other agency; or
(4) An agency or two or more municipalities located in the same State or in different States and having substantial powers or duties pertaining to the prevention and control of air pollution.

Source

10 CFR § 500.2


Scoping language

For purposes of this part and parts 501-507 term:

Is this correct? or