ed States, and the case will be governed by the federal common law established in Clearfield Trust, as modified by the Treasury regulations. See United States v. Texas, 507 U.S. 529, 534, 113 S.Ct. 1631, 123 L.Ed.2d 245 (1993).
This case, however, is unusual in that the depositer in the Clearfield Trust situation (Casa here, and J.C. Penney in Clear-field Trust) rather than the presenting bank (Norwest here, and Clearfield Trust in Clearfield Trust) seeks to assert rights against the United States. Clearfield Trust appears to assume that the United States would have no direct rights against the depositer, and that the depositer would have no direct claim against the Treasury. Instead, the depositer would have a claim against its own bank, and, presumably, under Parnell, that claim would be governed largely by state law. We find nothing in appellant’s authorities that suggests a different result, or any pertinent constitutional infirmity in the regulatory process.
Ill
A claim against the United States may be based on a theory that a statute or regulation is money-mandating as to the plaintiff. In United States v. Testan, 424 U.S. 392, 401-02, 96 S.Ct. 948, 47 L.Ed.2d 114 (1976), the Supreme Court held that
[w]here the United States is the defendant and the plaintiff is not suing for money improperly exacted or retained, the basis of the federal claim whether it be the Constitution, a statute, or a regulation does not create a cause of action for money damages, unless ... that basis “in itself can fairly be interpreted as mandating compensation by the Federal Government for the damage sustained.”
(citation omitted). In Collins v. United States, we held that because “the Tucker Act does not mandate the payment of plaintiffs alleged damages, to recover he must base his claim on some other statute that creates a substantive right by mandating the payment of his claim. The statute relied upon must grant a right of action with specificity.” 67 F.3d 284, 286 (Fed.Cir.1995) (citing Testan, 424 U.S. at 400, 96 S.Ct. 948). In Collins, we held that a statute stating that the government “may settle, and pay in the amount not more than $ 100,000, a claim against the United States” was not money-mandating, because the payment of the claim was discretionary under the statute. Id.
Here, Casa urges that the Treasury regulations, 31 C.F.R. § 240.3(c), (d), may be fairly interpreted as mandating compensation by the government. The regulations provide that “[t]he Treasury shall have the usual right of a drawee to examine checks presented for payment and refuse payment of any checks. The Treasury shall have a reasonable time to make such examination,” 31 C.F.R. § 240.3(c) (2001), and “[c]hecks shall be deemed to be paid by the United States Treasury only after first examination has been fully completed,” 31 C.F.R. § 240.3(d). Casa urges that the Treasury’s three-month delay before refusing payment of the check exceeded a reasonable time, such that the check should have been deemed paid according to 31 C.F.R § 240.3(d). Casa argues that once the check was deemed paid the Treasury could not refuse payment under 31 C.F.R. § 240.3(d), but would only be authorized to seek reclamation of the funds already paid and would have to follow the reclamation procedures under 31 C.F.R. §§ 240.6, 240.7. The reclamation procedures 31 C.F.R. §§ 240.6, 240.7 (2001), require that the Treasury provide the presenting bank with notice of its intent to reclaim the funds and an opportunity to protest the reclamation. Section 240.6 provides: