In Adamo Wrecking Co. v. United States, 434 U.S. 275, 98 S.Ct. 566, 54 L.Ed.2d 538 (1978), the Court reviewed the Administrator's action but limited its review to the question of whether the promulgated regulation could be considered an "emission standard": The narrow inquiry to be addressed by the court in a criminal prosecution is not whether the Administrator has complied with appropriate procedures in promulgating the regulation in question, or whether the particular regulation is arbitrary, capricious, or supported by the administrative record.... The question is only whether the regulation which the defendant is alleged to have violated is on its face an "emission standard" within the broad limits of the congressional meaning of that term. Adamo, 434 U.S. at 285, 98 S.Ct. at 573.