Whether commercial banks have prudential standing under the Administrative Procedure Act to challenge the NCUA's interpretation of § 109.
Holding
Yes. The banks' competitive interest in limiting the markets that federal credit unions may serve is arguably within the zone of interests protected by § 109.
Reasoning
APA review requires both Article III injury in fact and prudential standing. Under the APA's zone-of-interests test, the plaintiff's interest need only be arguably within the interests protected or regulated by the relevant statute. The parties agreed that the banks suffered injury in fact because the NCUA's policy permitted credit unions to serve customers the banks otherwise might serve.
The Court's financial-industry precedents—Data Processing, Arnold Tours, Investment Company Institute, and Clarke—established that a competitor may challenge agency action loosening statutory limits on financial institutions even if Congress did not specifically intend to benefit that particular competitor. The inquiry is not whether Congress meant to protect the plaintiff as such, but whether the plaintiff's affected interest is arguably among those the statute protects.
Section 109 expressly limits credit-union membership, and the limitation necessarily restricts the customer markets that credit unions may serve because their services generally are available only to members. Thus, a protected interest under § 109 is an interest in limiting the markets served by federal credit unions. The banks possess precisely that interest as competitors, and the NCUA's multiple-group interpretation directly expands credit unions' customer base.
The Court rejected the argument that standing depends on proof that Congress enacted § 109 to shield banks from competition. Its precedents did not require a congressionally intended benefit to the specific plaintiff class. Unlike the postal employees in Air Courier, the banks alleged direct competitive injury tied to the statutory restriction at issue.