40 CFR § 63.11144
What definitions apply to this subpart?
June 9, 2020
(a) On and before April 17, 2012, the terms used in this subpart are defined in the Clean Air Act; §§61.02 and 61.61 of this chapter; and §63.2 for terms used in the applicable provisions of subpart A of this part, as specified in §63.11143(b).
(b) After April 17, 2012, terms used in this subpart are defined in the Clean Air Act; §63.2; and §63.12005.
[77 FR 22906, Apr. 17, 2012]
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