Plaintiffs-appellants, tenants of Grace Towers and their representative organization the Grace Towers Tenants’ Association, appeal from a decision below denying their motion for a preliminary injunction against a 23% rental increase approved by defendant Secretary of Housing and Urban Devel *493 opment [“HUD”], and dismissing their complaint on the merits.
Grace Towers consists of two buildings of 84 units each located at 272 Pennsylvania Avenue and 2066 Pitkin Avenue, Brooklyn, New York. The project is federally subsidized with a 3% 40-year Below Market Interest Rate mortgage (BMIR) pursuant to Section 221(d)(3) of the National Housing Act, 12 U.S.C. § 17151 (d)(3), and receives rent supplementation on behalf of 10% of the tenants pursuant to 12 U.S.C. § 1701s. Grace Towers is owned by defendant Grace Housing Development Fund Co., Inc. (hereinafter “Grace HDFC”), a private non-profit housing corporation incorporated for the purpose of providing housing to families of low and moderate income. In order to participate in the section 221(d)(3) mortgage program, Grace HDFC signed the standard regulatory agreement with the Secretary of HUD which precludes the mortgagor from increasing rental charges above the approved rental schedule absent permission from HUD. The agreement provides, in part:
“No increase will be made in the amount of the gross monthly dwelling income . . . unless such increase is approved by the Commissioner, who will at any time entertain a written request for an increase properly supported by substantiating evidence and within a reasonable time shall:
(1) Approve a rental schedule that is necessary to compensate for any net increase, occurring since the last approved rental schedule, . . . over which Owners have no effective control, or
(2) Deny the increase stating the reasons therefore.”
In June, 1974, Grace HDFC applied to the Secretary of HUD for the requisite approval of a proposed rental increase. The mortgagor submitted evidence substantiating a deficit operation and on August 1, 1974, HUD approved a rental increase of 23%, effective October 1, 1974. At this time no regulation promulgated by HUD required tenant participation in the agency’s decision on a rental increase application. 1
On August 27, 1974, over a month before the effective date of the approved increase, Grace HDFC notified all tenants of the increase by letter. Grace HDFC also met with tenants during the last week of August and advised them who they should contact at HUD should they desire to speak with officials of the agency. Plaintiffs obtained counsel and a law clerk acting on the tenants’ behalf met with George Brown, acting Loan Manager of HUD and another HUD official on September 10, 1974. The tenants’ representative was advised that HUD had based the increase approval on materials evidencing a net deficit in the operation of Grace HDFC. Mr. Brown agreed to supply the tenants with the materials submitted by the mortgagor in support of the increase application, making it clear that HUD would appreciate being informed of any fraud or inaccuracies in those materials. A meeting between HUD and a delegation of tenants, together with their counsel, was held on September 20, 1974. At the meeting, HUD officials brought the relevant documents, elaborated upon the factors considered by HUD and reiterated the agency’s willingness to reconsider its decision if the tenants submitted evidence indicating any fraudulent or incorrect statements made by Grace HDFC management in the application or substantiating materials. At no time, however, did plaintiffs go beyond mere verbal protestation and avail themselves of the opportunity to submit materials to disprove the justification for the rental increase.
Plaintiffs advance three arguments for reversing the district court’s dismissal of their complaint: the procedure employed by HUD denied them their constitutional right *494 to due process of law; 2 HUD regulations which became operative after the effective date of the challenged increase should apply retroactively to void HUD’s approval and allow tenant participation in HUD’s decision-making process; and, finally, that HUD’s approval was based on insufficient evidence. We find none of these claims meritorious.
I.
In
Langevin v. Chenango Court, Inc.,
“By leaving rent control in [§ 221(d)(3)] projects to ‘a regulatory agreement’ between the Secretary and the mortgagor if no Federal, State or local law required more, . . . Congress indicated its belief that a mandatory provision for subjecting all rent increases in such projects to what would amount to a full-fledged public utility rate proceeding, with' the expense and delay necessarily incident thereto, might well kill the goose in ‘solicitude for the eggs.’ ”
Since
Langevin
was decided before the Supreme Court’s decisions in
Board of Regents v. Roth,
Plaintiffs, seeking to escape the applicability of
Langevin,
argue that in
Langevin
the housing project was a private profit motivated venture whereas Grace HDFC, although a private housing corporation, is a non-profit operation which has been financed by extensive aid from state and local sources. While that distinction may be responsive to the observation in
Langevin
that there was insufficient government involvement to invoke the due process clause,
We are reinforced in our decision herein, moreover, by the fact that the ad hoc procedures employed by HUD substantially afforded the tenants full due process. The tenants were given notice, had an opportunity to inspect data, held meetings with HUD officials, were given reasons for the approval and were invited to submit opposing materials although they failed to do so. HUD, according to plaintiffs’ own witness, expressed its readiness to reconsider the increase if shown any inaccuracies in the materials upon which it was based. Even those appellate courts which have found some due process right to exist, whether that right be statutory or constitutional in nature, have rejected as inappropriate a full adversary-type hearing in this context. See, e. g., Paulsen v. Coachlight Apartments Co., supra at 403 (statutory right); Geneva Towers Tenants Organization v. Federated Mortgage Investors, supra at 491-93 (constitutional right); Marshall v. Lynn, supra at 646 (statutory right).
II.
Plaintiffs next contend that regulations adopted by HUD which became operative subsequent to the effective date of the rent increase should be applied retroactively. Under the new regulations tenants of a § 221(d)(3) project are guaranteed 30 days advance notice of the mortgagor’s intention to seek an increase, 30 days in which to inspect and copy materials the mortgagor intends to submit to HUD in advance of their submission, the inclusion of tenant comments in the materials the mortgagor submits, and a copy of a written determination by the agency stating the reasons for approval or disapproval of the increase. 24 C.F.R. §§ 401.1-401.4.
Plaintiffs cite
Thorpe v. Housing Authority,
*496
Thorpe,
in any event, does not support plaintiffs’ retroactivity argument. While
Thorpe
states the general rule governing the retroactivity of administrative regulations, it also recognizes that exception is made when “manifest injustice” would be a consequence of retroactive application.
III.
Plaintiffs’ final contention is that the agency’s approval was based on insufficient evidence. We do not reach the merits of this claim. In
Langevin, supra,
at 302-304, we held such agency action non-reviewable as it falls within the second exception to reviewability in § 701(a) of the Administrative Procedure Act, 5 U.S.C. § 701(a), as action committed to agency discretion.
See also, Harlib v. Lynn, supra
at 56;
People’s Rights Organization v. Bethlehem Associates,
The order of the district court is affirmed.
Notes
. Subsequent to the Secretary’s approval of the instant rental increase application new, regulations were adopted, 24 C.F.R. § 401.1-401.4, which ensure tenants of a section 221(d)(3) project an opportunity to participate in the decision making process on rental increase applications. These regulations are discussed in Part 11, infra.
. Plaintiffs apparently do not press the claim that the National Housing Act confers upon tenants of a § 221(d)(3) project a statutory right to a hearing. Such a claim would, in any event, be unsuccessful.
Harlib v. Lynn,
. In
Lopez v. Henry Phipps Plaza South, Inc.,
