As used in this subchapter—

((1)) ** Affected source** The term “affected source” shall have the meaning given such term in subchapter IV–A.

((2)) ** Major source** The term “major source” means any stationary source (or any group of stationary sources located within a contiguous area and under common control) that is either of the following:

((A)) A major source as defined in .

((B)) A major stationary source as defined in or part D of subchapter I.

((3)) ** Schedule of compliance** The term “schedule of compliance” means a schedule of remedial measures, including an enforceable sequence of actions or operations, leading to compliance with an applicable implementation plan, emission standard, emission limitation, or emission prohibition.

((4)) ** Permitting authority** The term “permitting authority” means the Administrator or the air pollution control agency authorized by the Administrator to carry out a permit program under this subchapter.