Opinion for the Court filed by Chief Judge SENTELLE.
Appellants, nonprofit environmentalist organizations, appeal from a judgment of dismissal entered by the district court in an action against the United States Environmental Protection Agency (“EPA”) under the citizen suit provision of the Clean Air Act, challenging the Administrator’s failure to take action to prevent the construction of three proposed pollution-emitting facilities in Kentucky. The district court held that there was no mandatory duty to act and granted the EPA’s motion to dismiss for lack of subject matter jurisdiction. The nonprofits brought the present appeal. We affirm the dismissal on different grounds.
*851 I.
The Clean Air Act (“the Act”), 42 U.S.C. §§ 7401 et seq., creates a complex regulatory regime designed “to protect and enhance the quality of the Nation’s air resources.” § 7401(b)(1). As part of that regime, the Act empowers the Administrator of the EPA to establish National Ambient Air Quality Standards (“NAAQS”), setting allowable concentrations of air pollutants determined by the Administrator to meet statutorily defined criteria. §§ 7408-09. In furtherance of the attainment of the National Ambient Air Quality Standards, the Act requires each state to develop a State Implementation Plan (“SIP”) by which the state will achieve, maintain, and enforce those standards. § 7410. The Administrator is to designate areas of a state meeting the applicable ambient air quality standard as “attainment” areas. § 7407(d)(l)(A)(ii). The Act further requires states to prevent “significant deterioration” of air quality in attainment areas. §§ 7470 et seq. In furtherance of this goal, the Act requires, inter alia, that no major emitting facility may be constructed in an attainment area without a permit meeting the requirements of the Act. § 7475. Section 7477, entitled “Enforcement,” states that “[t]he Administrator shall, and a State may, take such measures, including issuance of an order, or seeking injunctive relief, as necessary to prevent the construction or modification of a major emitting facility ... proposed to be constructed” in an attainment area. The present controversy involves three major emitting facilities proposed to be built in attainment areas in Kentucky.
II.
The three projects underlying this litigation are the East Kentucky Power Cooperative’s J.K. Smith Generating Station coal-fired CFB Boiler Project (“Smith”), Conoco Phillips and Peabody’s Kentucky New-Gas Synthetic Natural Gas Production plant (“NewGas”), and Cash Creek Generation LLC’s coal-fired Cash Creek Generating Station (“Cash Creek”). Because each facility qualifies as a “major emitting facility,” see § 7479(1), and because each is proposed to be built in a county designated as an attainment area, all three facilities are required to obtain permits from the State of Kentucky. § 7475(a). The permits are part of the statutory Prevention of Significant Deterioration (“PSD”) program implementing the requirements of § 7475(a).
Kentucky granted PSD permits to each facility prior to September 15, 2010. That fact is significant because until that date, the Kentucky State Implementation Plan failed to meet the requirements of the Clean Air Act’s PSD regulations. In 1989 the EPA approved the PSD permitting program in effect in Kentucky prior to September 15, 2010. See Approval and Promulgation of Implementation Plans, Kentucky, 54 Fed.Reg. 36,307 (Sept. 1, 1989). In 1997, the EPA amended the federal NAAQS to revise the nation’s standards for ozone, see National Ambient Air Quality Standards for Ozone, 62 Fed.Reg. 38, 856 (July 18, 1997), and in 2005 the EPA required those new ozone standards to be incorporated in each state’s SIP, see Final Rule to Implement the 8-Hour Ozone NAAQS, 70 Fed.Reg. 71,612 (Nov. 29, 2005). Included in the 2005 EPA regulation was a requirement that state PSD programs regulate nitrogen oxides, or NOx, as an ozone precursor in attainment areas. 70 Fed.Reg. at 71,679. Despite the 2005 mandate, until September 15, 2010, Kentucky’s State Implementation Plan failed to incorporate the 1997 ozone NAAQS or to regulate NOx as a precursor to ozone under its PSD program. Therefore, the Smith, NewGas, and Cash Creek facilities do not comply with § 7475(a), which forbids the construction of such fa *852 cilities absent a PSD permit meeting the requirements of the Clear Air Act.
When neither the Administrator nor the state took action to prevent the construction of the nonconforming major emitting facilities, appellants, two environmentalist nonprofits (collectively referred to as “Sierra Club”), brought the present action under 42 U.S.C. § 7604(a)(2), which provides for the filing of citizen suits against the Administrator for her alleged failure to perform any nondiscretionary duty under the Act. Arguing that her duty under § 7477 was discretionary, and therefore beyond the reach of the statute, the Administrator moved for dismissal. Agreeing with the Administrator, the district court ruled that the Administrator’s decision not to exercise her statutory duty was discretionary, and thus not subject to judicial review.
Sierra Club v. Jackson,
III.
Before we can consider the merits of the Sierra Club’s appeal, we must first ensure that we have jurisdiction to do so. Article III of the Constitution limits the federal courts to adjudication of actual, ongoing controversies.
Honig v. Doe,
In this case, the Administrator advances two mootness arguments. First, the Administrator asserts that because Kentucky rescinded the East Kentucky Power Cooperative’s authorization to construct and operate the Smith facility, there is no longer a live controversy regarding this facility. As the Sierra Club admitted in its brief, “there is currently no need for EPA to prevent construction of Smith.” Br. for App. at 3. Although the Sierra Club suggested that its appeal with regard to the Smith facility was not moot because it qualifies for the “issue capable of repetition yet evading review” exception, it essentially conceded the issue at oral argument. Or. Arg. 3:24-30. (“There are three plants and one of the plants is gone, so it is moot.”). We agree. The appeal is moot with respect to the Smith facility.
The Administrator’s first mootness argument does not apply to the other two facilities, as their permits remain in effect and they remain in proposed-to-be-constructed status. Nonetheless, the Administrator argues that the controversy concerning their construction is moot as well. In her view, the proposed facilities are no longer out of compliance with § 7475(a). She bases this contention on the fact that the previously nonconforming SIP has been in compliance since September 15, 2010. Therefore, the Administrator argues, the projects no longer fall within the prohibition of § 7475(a) as they are not proposed to be built in attainment areas that are currently “not subject to an implementation plan which meets the requirements of this part [of the Clean Air Act].” 42 U.S.C. § 7477. Thus, she contends, even if § 7477 does create a manda *853 tory duty, that section is no longer applicable. She further contends that because the statute no longer applies, any opinion on her duty under the previous regime would be purely advisory.
Sierra Club offers two responses to the second mootness argument. First, it contends that Kentucky’s newly achieved compliance is irrelevant because Kentucky issued the PSD permits in question under the prior non-compliant Kentucky State Implementation Plan. Those permits, it contends, do not meet the standards imposed by § 7475 as compliance with that statute should be judged at the time of the issuance rather than some subsequent date. In Sierra Club’s view, if there is to be a compliant permit for a facility, that permit must issue under a compliant plan.
Secondly, Sierra Club asserts that the Kentucky SIP suffers from a further defect not rectified by the September 15, 2010 final rule. It contends that the Clean Air Act’s PSD program requires public notice of the impact that a new source of air pollution will have on air quality standards in nearby Class I areas, such as wilderness and national parks. The Kentucky Plan, on the other hand, requires notice only for Class I areas located in the same county as the proposed source, and therefore there was no published public notice to describe the impact that the new facilities would have on other nearby Class I areas. In short, Sierra Club argues, this case still presents a live controversy because even as currently amended the Kentucky Plan does not conform to the notice requirements of the Clean Air Act.
Without passing on the merits of Sierra Club’s contentions, we agree that the question of the validity of the PSD permits issued under the noncompliant SIP and the possible invalidity of the amended SIP raise sufficient current controversy to save this litigation from mootness as to the NewGas and Cash Creek facilities.
IV.
Although we hold that we do not lose jurisdiction over this controversy by reason of mootness, this does not resolve the jurisdictional theory upon which the district court relied in dismissing the case under Rule 12(b)(1) for lack of subject matter jurisdiction.
Sierra Club,
Because the APA does not apply to agency action committed to agency discretion by law, a plaintiff who challenges such an action cannot state a claim under the APA. Therefore, the court has jurisdiction over his case pursuant to § 1331, but will properly grant a motion to dismiss the complaint for failure to state a claim.
Oryszak,
It is fixed law that “this Court is bound to follow circuit precedent until it is overruled either by an
en banc
court or the Supreme Court.”
Maxwell v. Snow,
Although
Association of Irritated Residents
and
Trudeau
concerned different sections of the APA — section 701(a)(2) rather than section 704 — our opinion in
Trudeau
should have guided our deliberations in
Association of Irritated Residents
as it did later in
Oryszak.
Therefore, following the norm that the older case remains undisturbed by the later, it is
Trudeau
and not
Association of Irritated Residents
that provides precedent for our current review. Applying
Oryszak
and
Trudeau,
we conclude that a complaint seeking review of agency action “committed to agency discretion by law,” 5 U.S.C. § 701(a)(2), has failed to state a claim under the APA, and therefore should be dismissed under Rule 12(b)(6), not under the jurisdictional provision of Rule 12(b)(1).
Oryszak,
With the threshold questions behind us, we now consider the merits of the district court’s dismissal of the complaint, now guided by the provisions of Rule 12(b)(6). We review that decision
de novo
*855
and, like the district court, accept the factual allegations in the complaint as true.
Jerome Stevens Pharm. v. Food & Drug Admin.,
The judicial review provisions of the Administrative Procedure Act (“APA”), 5 U.S.C. §§ 701-06, establish a cause of action for parties adversely affected either by agency actions or by an agency’s failure to act.
Heckler v. Chaney,
To determine whether a matter has been committed to agency discretion, we “ ‘consider both the nature of the administrative action at issue and the language and structure of the statute that supplies the applicable legal standards for reviewing that action.’ ”
Twentymile Coal,
In this case, the Sierra Club argues that the district court erred when it held that § 7477 does not place a mandatory, judicially-reviewable duty upon the EPA Administrator. The Sierra Club asserts that the express language of § 7477, specifically the close juxtaposition of the mandatory “the Administrator shall” with the permissive “the State may,” establishes that Congress intended to strip the Administrator of discretion. The crux of the Sierra Club’s argument is that the plain text of § 7477 makes enforcement by the Administrator mandatory and subjects *856 the Administrator’s decision not to enforce to judicial review.
The Sierra Club’s textual argument carries considerable weight. As we have repeatedly noted, “shall” is usually interpreted as “the language of command.”
See, e.g., Zivotofsky v. Sec’y of State,
Upon examination of the context and structure of § 7477, we agree with the Administrator that she had sufficient discretion to render her decision not to act nonjusticiable. Congress’s mandate to the Administrator is that she shall “take such measures, including issuance of an order, or seeking injunctive relief, as necessary....” There is no guidance to the Administrator or to a reviewing court as to what action is “necessary.” Granted, the statute further says, “as necessary to prevent the construction or modification of a major emitting facility ... proposed to be constructed” in an attainment area, but that nonetheless leaves it to the Administrator’s discretion to determine what action is “necessary.” Where, as here, the Administrator is satisfied that the PSD permit issued under the noncompliant SIP is sufficient, then she has apparently made the decision that no action is necessary. In more general terms, agencies must regularly determine what action, if any, they should take, depending on numerous factors, including “whether agency resources are best spent on this violation or another, whether the agency is likely to succeed if it acts, whether the particular enforcement action requested best fits the agency’s overall policies, and, indeed, whether the agency has enough resources to undertake the action at all.”
Chaney,
Section 7477 satisfies both
Overton Park’s
description of a statute “drawn in such broad terms that in a given ease there is no law to apply,”
CONCLUSION
For the foregoing reasons, the Sierra Club failed to state a claim upon which relief could be granted. Although the district court dismissed the case pursuant to Federal Rule of Civil Procedure 12(b)(1) for lack of subject matter jurisdiction, we affirm the district court’s action because dismissal would otherwise have been proper under Rule 12(b)(6).
See St. Francis Xavier Parochial Sch.,
So ordered.
