Cite as: 504 U. S. 555 (1992)
Opinion of Scalia, J.
the agencies, see § 1536(a)(2) ("Each Federal agency shall, in consultation with and with the assistance of the Secretary, insure that any" funded action is not likely to jeopardize endangered or threatened species) (emphasis added). When the Secretary promulgated the regulation at issue here, he thought it was binding on the agencies, see 51 Fed. Reg. 19928 (1986). The Solicitor General, however, has repudiated that position here, and the agencies themselves apparently deny the Secretary's authority. (During the period when the Secretary took the view that § 7(a)(2) did apply abroad, AID and FWS engaged in a running controversy over whether consultation was required with respect to the Mahaweli project, AID insisting that consultation applied only to domestic actions.)
Respondents assert that this legal uncertainty did not affect redressability (and hence standing) because the District Court itself could resolve the issue of the Secretary's authority as a necessary part of its standing inquiry. Assuming that it is appropriate to resolve an issue of law such as this in connection with a threshold standing inquiry, resolution by the District Court would not have remedied respondents' alleged injury anyway, because it would not have been binding upon the agencies. They were not parties to the suit, and there is no reason they should be obliged to honor an incidental legal determination the suit produced.4 The
4 We need not linger over the dissent's facially impracticable suggestion, post, at 595-596, that one agency of the Government can acquire the power to direct other agencies by simply claiming that power in its own regulations and in litigation to which the other agencies are not parties. As for the contention that the other agencies will be "collaterally estopped" to challenge our judgment that they are bound by the Secretary of the Interior's views, because of their participation in this suit, post, at 596-597: Whether or not that is true now, it was assuredly not true when this suit was filed, naming the Secretary alone. "The existence of federal jurisdiction ordinarily depends on the facts as they exist when the complaint is filed." Newman-Green, Inc. v. Alfonzo-Larrain, 490 U. S. 826, 830 (1989) (empha-
569
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