...establishing national primary and secondary ambient air quality standards, the Administrator shall within 30 days after the date of enactment of the Clean Air Amendments of 1970 publish, and shall from time to time thereafter revise, a list which includes each air pollutant —...

...establishing national primary and secondary ambient air quality standards, the Administrator shall within 30 days after the date of enactment of the Clean Air Amendments of 1970 publish, and 17 Automotive Parts & Accessories Ass'n v. Boyd, 132 US App. DC 200, 407 F.2d 330 (1968)....

...section. (The language of section 231 (a) of the Clean Air Act follows :) "SEC. 231. (a)(l) Within 90 days after the date of enactment of the Clean Air Amendments of 1970, the Administrator shall commence a study and investigation of emisions of air pollutants from aircraft...

...Effective with respect to vehicles and engines manufactured during model years beginning more than 60 days after the date of enactment of the Clean Air Amendments of 1970 — "(1) If the Administrator determines that a substantial number of any class or category of vehicles...

...deems appropriate. " (2) With respect to any air pollutant for which air quality criteria are issued after the date of enactment of the Clean Air Amendments of 1970, the Administrator shall publish, simultaneously with the issuance of such criteria and information,...

...techniques issued pursuant to this section. (d) (no change) Sec. l09. (a) (l) The Administrator -- (A) within 30 days after the date of enactment of the Clean Air Amendments of 1976 l97 , shall publish proposed regulations prescribing (i^ a national primary ambient air quality...

...techniques issued pursuant to this section. (d) (no change) Sec. 109. (a) (1) The Administrator — (A) within 30 days after the date of enactment of the Clean Air Amendments of 1976 197 , shall publish proposed regulations prescribing (1^ a national primary ambient air quality...

...Legal Background Section 109 of the Clean Air Act (42 USC 1857c4) requires the EPA "within thirty days after the date of enactment of the Clean Air Amendments of 1970" to publish proposed regulations for setting forth a national primary air quality standard "for each...

...establishing national primary and secondary ambient air quality standards, the Administrator shall within 30 days after the date of enactment of the Clean Air Amendments of 1970 publish, and shall from time to time thereafter revise, a list which includes each air pollutant —...

...date of enactment; and (2) With respect to any air pollutant for which air quality criteria are issued after the date of enactment of the Clean Air Amendments of 1970, the Administrator shall publish, simultaneously with the issuance of such criteria and information,...