delivered the opinion of the Court.
The First National Bank — Detroit closed its doors in 1933 and, in its liquidation, dividends on proved claims, small in average but large in the aggregate, have remained for some years in the hands of the federal liquidators, unclaimed by their owners. Since this national banking institution was located in the State of Michigan, Attorneys General оf that State have made persistent efforts at different stages of the liquidation to establish a right in the State to escheat the unclaimed dividends. Latest оf these was this action, brought by the Attorney General
*228
against the Comptroller of the Currency of the United States
1
and the Receiver of the First National Bаnk— Detroit, for a declaratory judgment that the Michigan discovery and escheat statute (Michigan Compiled Laws, 1929, Mason’s 1940 Cum. Supp., c. 263), as amended by the stаtute known as Act 170, Public Acts of Michigan for 1941, applies to unclaimed dividends on claims duly proved in the liquidation. The Court of Appeals held the state statute ineffective as “an unlawful interference with the liquidation of a national bank upon the same principles and authority fully discussed in our previous oрinions.” It affirmed the District Court in dismissing the action “on the merits,” adopting the “settled doctrine” of its own prior adjudications.
In
Starr
v.
O’Connor,
In
Rushton
v.
Schram,
In
Starr
v.
Schram,
Now comes
Black
v.
Delano
—the present case, Roth being substituted for Black—
*230 Anderson National Bank v. Luckett, supra, in substance, held that the Constitution of the United States does not prohibit a State from escheating depоsits in a national bank located and actively doing business therein, abandoned by their owners or belonging to missing persons. The State, after a reasonаble lapse of time may lawfully administer such assets, holding them for the benefit of the disappeared claimant or the missing owner for a period and рroviding for eventual escheat. This it may do through appointment of a personal representative, or a public administrator, or by utilizing its own public officials. We held that mere putting of the State itself, or its duly named officer, in the shoes of the claimant to take what the bank would otherwise be obliged to disburse to the claimant himself does not burden, obstruct or frustrate a going bank in discharging its federal functions. We also held no interference with a bank’s federаl function to result from a mere requirement that it make a report to the State of unclaimed property, any more than from a requirement that it rеport to the State tangible property therein for the purposes of taxation, and nothing in our decisions suggests that such a disclosure would be an intеrference with the liquidation function. It would not seem too much to ask that a federal officer, possessed of property claimed by the Statе to be subject to its taxing or escheat power, make reasonable disclosure thereof to such authority as the State designates. It is but a decent comity between governments.
Of course, these basic and general rights of the State, including the enforcement of its claims, might be asserted at a time, in a manner or through such means as to interfere with the federal function of orderly liquidation or to conflict with federal law; but absent such interference with a federal statute, the basic assumption of the State here that nothing in the Constitution prevents it from escheating the specific claims here involved is made
*231
clear in our recent decisions.
Anderson National Bank
v.
Luckett, supra.
See also
Connecticut Mutual Life Insurance Co.
v.
Moore,
Reiteration of these general principles does not, of course, determine whether any peculiarity in the operation of Act 170 would go beyond the right of the State and constitute an unreasonable burden on federal functions of the receiver. But this question , is not appropriate for decision here. If the judgment below rests, as well it may, upon earlier decisional law of the Circuit which held that this Act was not intended to apply to receiverships beginning before its enactment, we would hardly review such construction of the State Act. And there is a further reason why we should not now dеcide the principal question. Michigan has repealed Act No. 170 by Act 329, Public Acts of Michigan for 1947, reserving, however, from the effect of the repeal any “pending suit or proceeding.” A possible consequence is that no new suit or proceeding could be maintained to enforce the rеpealed Act. Thus, to now decide this suit for a declaratory judgment might be to render an advisory opinion on the constitutionality of a repealed State Act. And, of course, a State cannot by reservation, any more than by affirmation, confer upon us the power or impose upon us the duty to render an advisory opinion.
In view of these considerations, we vacate and remand to the Court of Appeals for such action as it may сonsider appropriate in the light of the foregoing opinion.
Judgment vacated.
Notes
The trial court dismissed as to the Comptroller on the ground it had no jurisdiction over him and the Court of Appeals did not pass on the contention that he is a necessary party.
