OPINION OF THE COURT

This appeal is from an order of the District Court dismissing the action below for lack of jurisdiction. On March 14, 1966, appellants Merge and Hooper sued the several appellees, seeking to recover certain “relocation” moving expenses allegedly due them under federal law. Upon motion of appellee Urban Redevelopment Authority of Pittsburgh, the action was dismissed under F.R.Civ. P. 12 on the grounds that Congress had withdrawn jurisdiction of the Federal Courts by the 1964 amendments to the Federal Housing Act. We think the District Court’s dismissal was proper but the grounds for our affirmance require some elaboration.

Appellants Merge and Hooper1 conducted a business in the City of Pittsburgh which operated from two leased, but separate, buildings, one on either side of a street. In October 1961 the Urban Redevelopment Authority of Pittsburgh (Pittsburgh Authority) condemned one of the two buildings as part of an Urban Renewal Project. The boundary of the renewal area ran along the street between the two leased buildings.

The Pittsburgh Authority had entered, on November 3,1960, into a contract with the United States Government under which the Federal Government gave certain financial assistance to the local Pittsburgh Authority. This contract, a “Title I Loan and Grant Contract,” was entered into by the appropriate federal administrative agency (now the appellee Urban Renewal Administration of the Department of Housing and Urban Development — hereinafter HUD) pursuant to the Federal Slum Clearance Act or Housing Act of 1949, as amended, 42 U.S.C. §§ 1441 et seq. Congress had provided in this statute that the Administrator of the federal agency (now appellee Secretary Weaver of HUD) could include in any Title I contract a provision permitting the local Authority to make “relocation payments” for which the Federal Government would reimburse the local Authority by an increase in the amount otherwise payable under the Title I contract. Relocation payments made pursuant to any such contract provision were to “be made subject to such rules and regulations prescribed by the [federal] Administrator.” 2 42 U.S.C. § 1456 (f) (2).

The appellants petitioned the Pittsburgh Authority for their allowable relocation expenses — “total certified actual moving expenses” — and received payment for the costs of moving from the one actually condemned building. Their request for the expenses of moving from *81the second building across the street was denied by the Pittsburgh Authority. A similar request for these “second building” moving expenses in the form of part of the damages for the taking was also denied by the Board of Viewers appointed by a state court upon the appellants’ petition. The third attempt to obtain the additional moving expenses was a suit in the District Court on February 20, 1963, against the predecessors of the present appellees.3 The District Court entered summary judgment for the defendants on the theory that the plaintiffs, appellants here, lacked standing and hence had no cause of action. In a divided opinion, after argument before this court sitting en banc, we reversed the summary judgment. Merge v. Sharott, 341 F.2d 989 (3rd Cir. 1965).4 Three opinions were written, none of which was supported by a majority of the court.5

A re-examination of the opinions reveals two different theories of the nature of the plaintiffs’ cause of action. The plurality opinion accepted a stipulation for purposes of appeal that at trial the plaintiffs could prove the two separate buildings were a fully integrated business unit. The plurality then reasoned that a trial should be held to see if, factually, a taking had occurred of a “business concern” (which, on the record then before the court due to the stipulation, was a single unit despite one building being outside the renewal boundary) and, therefore, payment of less than all the moving expenses of the “business concern” would be an arbitrary or capricious administrative determination. The conclusion of the plurality opinion that the plaintiffs had both a cause of action and standing rests on the theory that the federal statute governing relocation payments (and the regulations promulgated thereunder) created a binding obligation of the United States, statutory in origin, and jurisdiction therefore existed under 28 U.S.C. § 13316 for plaintiffs to seek redress of a federally-created “right.”

The dissenting opinion,7 after analyzing the same statutory and contractual framework, reached the conclusion that the plaintiffs had no cause of action against the United States based on a federal statute. In the dissenters’ view, the Title I contract between HUD and the Pittsburgh Authority at least gave the plaintiffs a cause of action against the Pittsburgh Authority, the plaintiff suing as third-party beneficiaries of a contract that included by reference or incorporation certain standards established by statute and regulation. The dissent added that such a cause of action, since not raising a “federal question,” was not maintainable in the Federal Courts absent diversity of citizenship.8

*82We do not in this appeal have to decide which theory, if either, was correct. Under either theory, the appellants’ suit in the present case is outside the court’s jurisdiction. Under the plurality approach in Merge v. Sharott, the cause of action is statutory, a suit to recover based on rights granted by Congress. The suit at bar, however, was brought on March 14, 1966, after Congress had made substantial amendments to the relevant statute.

In 1964, the entire section of the Housing Act covering relocation payments, 42 U.S.C. § 1456(f), was repealed, effective September 2, 1964. The new provisions, 42 U.S.C. § 1465, provided for additional relocation benefits and changed the definitions and standards governing the payments. By 42 U.S.C. § 1465(d),9 Congress also made a specific addition to the Federal Administrator’s power to promulgate regulations which would apply to any relocation payments allowable under a Title T contract. The Administrator (now the Secretary of HUD) might provide that determinations by the local Authority on such payments would be “final and conclusive for any purposes and not subject to redetermination by any court. * * * ” Under this grant of authority, regulations were first issued January 13,1965, 30 Fed.Reg. 439, 441, § 3.104(e) (1965), making documented determinations by the local public agency “final and conclusive for any purposes and not subject to redetermination by any court. * * *” The same 1964 amendments also provided (§ 310(b) of Pub.L. 88-560, 42 U.S.C.A. § 1465, historical note at 320) that any Title I contract executed before September 2, 1964, could be amended to provide for the payments authorized by the new relocation payments section, 42 U.S.C. § 1465.

The record on this appeal contains a stipulation by the parties of the Title I contract between HUD and the Pittsburgh Authority entered into November 3, 1960, and, in addition, of the “Fourth Amendatory Contract” thereto signed February 25, 1965. This stipulation shows that § 8 of the original Title I contract (see 341 F.2d at 992, n. 4), which originally read, inter alia,

“ * * * payments which are made by the Local Public Agency * * * in accordance with the * * * ‘Rules and Regulations Governing Relocation Payments under Section 106(f) of the Housing Act of 1949, As Amended’ * * * ” 10

was amended by § 4(a) of the Fourth Amendatory Contract by deleting the emphasized language so that the language beginning “ ‘Rules * * * ’ ” reads, inter alia,

“ * * * ‘Rules and Regulations Governing Relocation Payments under the Housing Act of 1949, As Amended’. * * *»

The appellants’ claim, therefore, is governed by the Federal Housing Act as presently amended. Their right to recovery, if any, arises because the denial of their certified moving expenses is discretionary action which so deviates from the federal statutory (and regulations) standards that the administrative determination by the Pittsburgh Authority is arbitrary and capricious. But under the statute and regulations as now amended, such administrative determinations are declared “final and conclusive for any purpose and not subject to re-determination by any court.”

Viewing this suit thus, as based on a “right” created by federal statute, we agree fully with the District Court that under Bruner v. United States, 343 U.S. 112, 72 S.Ct. 581, 96 L.Ed. 786 (1962); Smallwood v. Gallardo, 275 U.S. 56, 48 S.Ct. 23, 72 L.Ed. 152 (1927); and Hallowell v. Commons, 239 U.S. 506, 36 S.Ct. 202, 60 L.Ed. 409 (1916), the *83court loses all jurisdiction, even in a ease already pending, when Congress amends the governing statute by taking jurisdiction from the courts. Despite appellants’ argument to the contrary, we find nothing in the statutory scheme or implementing regulations that shows an intent to withdraw such jurisdiction only for determinations made since a certain date. While it is true that certain relocation benefits were explicitly made retroactive to January 27,1964, it is not even logical to conclude further that withdrawal of court jurisdiction also is “retroactive” only to January 1964. On the contrary, the statute begins with reference to displacements and moving expenses incurred on and after August 7, 1956, and concludes by authorizing regulations, including the withdrawal of court jurisdiction, to carry out “the provisions of this section.” “This section” appears to us plainly to refer to the entire section, 42 U.S.C. § 1465, which replaced totally the former relocation payment subsection, 42 U.S.C. § 1456(f). Hence, the conclusion of the District Court that the court lacked jurisdiction to review the Pittsburgh Authority’s determination is correct.

Under the second theory of the appellants’ cause of action, it may be true that as third-party beneficiaries of a Title I contract they have a claim for damages or performance that arose in 1961. When the Pittsburgh Authority declined to award the additional moving expenses, it perhaps created a cause of action for breach of the Title I contract, as then drafted and including by reference the statutory standards then applicable.11 Under this theory of the case, it might be true that the amended statute and new regulation making local determinations final and conclusive for any purposes would not apply to this particular suit. But we do not need to decide or comment on this problem arising under a contract theory of this controversy because the appellants’ suit against the Pittsburgh Authority lacks the requisite diversity jurisdiction.12

For the above reasons, the order of the District Court dated April 28, 1967, as amended by order of May 5, 1967, was correct and will be affirmed.