When the engine of an Air Force aircraft failed in flight, the
pilot was severely injured when he ejected from the plane. After
Air Force collateral and safety investigations of the incident had
been completed, the pilot filed a damages action against
respondents as the entities responsible for the design and
manufacture of the plane's ejection equipment. Respondents sought
pretrial discovery of documents containing confidential unsworn
statements made during the safety investigation by the pilot and
the airman who had rigged and maintained the pilot's parachute
equipment. But such discovery was prevented by
Machin v.
Zukert, 114 U.S.App.D.C. 335, 316 F.2d 336,
cert.
denied, 375 U.S. 896, which held that confidential statements
made to air crash safety investigators are privileged with respect
to pretrial discovery. Respondents then filed requests for the
statements under the Freedom of Information Act (FOIA) and, when
the Air Force refused production, commenced an action in Federal
District Court, which held that the statements were protected from
disclosure by Exemption 5 of the FOIA, which exempts from
disclosure
"inter-agency or intra-agency memorandums or letters which would
not be available by law to a party other than an agency in
litigation with the agency."
The Court of Appeals reversed, holding that, although the
requested documents were "intra-agency memorandums" within the
meaning of Exemption 5 and were protected from civil discovery
under the
Machin privilege, the statutory phrase "would
not be available by law" did not encompass every civil discovery
privilege, but rather reached only those privileges explicitly
recognized in the FOIA's legislative history, which the court read
as not extending to the
Machin privilege.
Held: The statements in question are protected from
disclosure by Exemption 5. The Exemption's plain language, as
construed by this Court's prior decisions, is sufficient to resolve
the question presented. The statements are unquestionably
"intra-agency memorandums or letters" within the meaning of the
Exemption, and, since the
Machin privilege normally
protects them from civil discovery, they "would not be available by
law to a party other than [the Air Force] in litigation with [the
Air Force]." Exemption 5's scope is not limited to privileges
Page 465 U. S. 793
explicitly identified by Congress in the FOIA's legislative
history. To hold that material that is normally privileged can be
obtained through the FOIA would create an anomaly in that the FOIA
could be used to supplement civil discovery. And Exemption 5's
legislative history does not contain the kind of compelling
evidence of congressional intent that would necessitate looking
beyond the plain statutory language, but rather indicates that
Congress intended to incorporate governmental privileges analogous
to the
Machin privilege. Pp.
465 U. S.
798-804.
688 F.2d 638, reversed. STEVENS, J., delivered the opinion for a
unanimous Court.
JUSTICE STEVENS delivered the opinion of the Court.
The Freedom of Information Act (FOIA), 5 U.S.C. § 552 (1982
ed.), requires federal agencies to disclose records [
Footnote 1] that
Page 465 U. S. 794
do not fall into one of nine exempt categories. [
Footnote 2] The question presented is whether
confidential statements obtained during an Air Force investigation
of an air crash are protected from disclosure by Exemption 5, which
exempts
"inter-agency or intra-agency memorandums or letters which would
not be
Page 465 U. S. 795
available by law to a party other than an agency in litigation
with the agency."
I
On October 9, 1973, the engine of an Air Force F-106B aircraft
failed in flight. Captain Richard Hoover, the pilot, was severely
injured when he ejected from the plane. Under Air Force
regulations, the incident was a significant air crash that required
two separate investigations: a "collateral investigation" and a
"safety investigation."
The collateral investigation is conducted
"to preserve available evidence for use in claims, litigation,
disciplinary actions, administrative proceedings, and all other
purposes. [
Footnote 3]"
Witnesses in a collateral investigation testify under oath and
generally are protected by the procedural safeguards that are
applicable in other formal hearings. The record of the collateral
investigation is public.
The safety investigation is quite different. It is conducted by
a specially appointed tribunal which prepares a report that is
intended for "the sole purpose of taking corrective action in the
interest of accident prevention." [
Footnote 4] To encourage witnesses to speak fully and
frankly, they are not sworn, and receive an assurance that their
statements will not be used for any purpose other than accident
prevention. [
Footnote 5] Air
Force regulations contain a general prohibition against the release
of safety investigation reports and their attachments, [
Footnote 6] subject to an exception
which allows the Judge Advocate General to release specified
categories of "factual material" and "nonpersonal evidence."
[
Footnote 7]
Page 465 U. S. 796
After the collateral and safety investigations had been
completed, Captain Hoover filed a damages action against various
entities responsible for the design and manufacture of his plane's
ejection equipment. [
Footnote
8] During pretrial discovery in that litigation, two of the
parties (respondents Weber [
Footnote 9] and Mills [
Footnote 10]) sought discovery of all Air Force
investigative reports pertaining to the accident. The Air Force
released the entire record of the collateral investigation, as well
as certain factual portions of the safety investigation, but it
refused to release the confidential portions of the safety
investigation.
Confidential statements made to air crash safety investigators
were held to be privileged with respect to pretrial discovery over
20 years ago.
Machin v. Zukert, 114 U.S.App.D.C. 335, 316
F.2d 336,
cert. denied, 375 U.S. 896 (1963). That holding
effectively prevented respondents from obtaining the pretrial
discovery they sought -- specifically the unsworn statements given
by Captain Hoover and by the airman who had rigged and maintained
his parachute equipment. Respondents therefore filed requests for
those statements under the FOIA, and when the Air Force refused
production, they commenced this action.
In the District Court, the Government filed an affidavit
executed by the General responsible for Air Force safety
investigations, explaining that the material that had been
withheld
Page 465 U. S. 797
contained "conclusions, speculations, findings and
recommendations made by the Aircraft Mishap Investigators," as well
as "testimony provided by witnesses under a pledge of
confidentiality." App. 38. The affidavit explained why the General
believed that the national security would be adversely affected by
the disclosure of such material. [
Footnote 11] The District Court held that the material at
issue would not be available by law to a party other than an agency
in litigation with an agency, and hence need not be disclosed by
virtue of
Page 465 U. S. 798
Exemption 5. [
Footnote
12] The Court of Appeals reversed. 688 F.2d 638 (CA9 1982). It
agreed that the requested documents were "intra-agency memorandums"
within the meaning of Exemption 5, and that they were protected
from civil discovery under the
Machin privilege. It held,
however, that the statutory phrase "would not be available by law"
did not encompass every civil discovery privilege, but rather
reached only those privileges explicitly recognized in the
legislative history of the FOIA. It read that history as accepting
an executive privilege for predecisional documents containing
advice, opinions, or recommendations of Government agents, but as
not extending to the
Machin civil discovery privilege for
official Government information. It accordingly remanded the case
with directions to disclose the factual portions of the witnesses'
statements.
II
The plain language of the statute itself, as construed by our
prior decisions, is sufficient to resolve the question presented.
The statements of the two witnesses are unquestionably
"intra-agency memorandums or letters," [
Footnote 13] and, since the
Machin privilege
normally protects them from discovery in civil litigation, they
"would not be available by law to a party other than [the Air
Force] in litigation with [the Air Force]." [
Footnote 14]
Page 465 U. S. 799
Last Term, in
FTC v. Grolier Inc., 462 U. S.
19 (1983), we held that Exemption 5 simply incorporates
civil discovery privileges:
"The test under Exemption 5 is whether the documents would be
'routinely' or 'normally' disclosed upon a showing of
relevance."
Id. at
462 U. S. 26.
[
Footnote 15] Thus, since
the
Machin privilege is well recognized in the case law as
precluding routine disclosure of the statements, the statements are
covered by Exemption 5.
Grolier was consistent with our prior cases. For
example,
Grolier itself relied on
Renegotiation Board
v. Grumman Aircraft Engineering Corp., 421 U.
S. 168 (1975), which
Grolier quoted on the
scope of Exemption 5:
"'Exemption 5 incorporates the privileges which the Government
enjoys under the relevant statutory and
case law in the
pretrial discovery context.'"
462 U.S. at
462 U. S. 26-27
(emphasis added in
Grolier) (quoting 421 U.S. at
421 U. S.
184). Similarly, in
NLRB v. Sears, Roebuck &
Co., 421 U. S. 132
(1975), we wrote: "Exemption 5 withholds from a member of the
public documents which a private party could not discover in
litigation with the agency."
Id. at
421 U. S. 148.
[
Footnote 16] In
Federal
Open Market Committee v. Merrill, 443 U.
S. 340 (1979), we wrote:
"The House Report [on the FOIA] states that Exemption 5 was
intended to
Page 465 U. S. 800
allow an agency to withhold intra-agency memoranda which would
not 'routinely be disclosed to a private party through the
discovery process in litigation with the agency. . . .'"
Id. at
443 U. S. 353
(quoting H.R.Rep. No. 1497, 89th Cong., 2d Sess., 10 (1966)). And
in
EPA v. Mink,
410 U. S. 73
(1973), the Court observed:
"This language clearly contemplates that the public is entitled
to all such memoranda or letters that a private party could
discover in litigation with the agency."
Id. at
410 U. S. 86.
[
Footnote 17]
Respondents read
Merrill as limiting the scope of
Exemption 5 to privileges explicitly identified by Congress in the
legislative history of the FOIA. But in
Merrill, we were
confronted with a claimed exemption that was not clearly covered by
a recognized pretrial discovery privilege. We held that Exemption 5
protected the Federal Open Market Committee's Domestic Policy
Directives, although it was not entirely clear that they fell
within any recognized civil discovery privilege, because statements
in the legislative history supported an inference that Congress
intended to recognize such a privilege.
See 443 U.S. at
443 U. S.
357-360. Thus, the holding of
Merrill was that
a privilege that was mentioned in the legislative history of
Exemption 5 is incorporated by the Exemption -- not that all
privileges not mentioned are excluded.
Page 465 U. S. 801
Moreover, the
Merrill dictum upon which respondents
rely merely indicates "that it is not clear that Exemption 5 was
intended to incorporate every privilege known to civil discovery."
Id. at
443 U. S. 354.
It is one thing to say that recognition under Exemption 5 of a
novel privilege, or one that has found less than universal
acceptance, might not fall within Exemption 5 if not discussed in
its legislative history. It is quite another to say that the
Machin privilege, which has been well settled for some two
decades, need be viewed with the same degree of skepticism.
[
Footnote 18] In any event,
the
Merrill dictum concludes only that
"a claim that a privilege other than executive privilege or the
attorney privilege is covered by Exemption 5 must be viewed with
caution."
443 U.S. at
443 U. S. 355.
The claim of privilege sustained in
Machin was denominated
as one of executive privilege.
See 114 U.S.App.D.C. at
337, 316 F.2d at 338. [
Footnote
19] Hence, the dictum is of little aid to respondents.
Moreover, respondents' contention that they can obtain through
the FOIA material that is normally privileged would create an
anomaly, in that the FOIA could be used to supplement civil
discovery. We have consistently rejected such a construction of the
FOIA.
See Baldrige v. Shapiro, 455 U.
S. 345,
455 U. S. 360,
n. 14 (1982);
NLRB v. Sears, Roebuck & Co., 421 U.S.
at
421 U. S. 143,
n. 10;
Renegotiation Board v. Bannercraft Clothing Co.,
415 U. S. 1,
415 U. S. 24
(1974). We do not
Page 465 U. S. 802
think that Congress could have intended that the weighty
policies underlying discovery privileges could be so easily
circumvented. [
Footnote
20]
Finally, the legislative history of Exemption 5 does not contain
the kind of compelling evidence of congressional intent that would
be necessary to persuade us to look beyond the plain statutory
language. Because of the difficulty inherent in compiling an
exhaustive list of evidentiary privileges, [
Footnote 21] it would be impractical to treat
the legislative history of Exemption 5 as containing a
comprehensive list of all privileges Congress intended to adopt.
Rather, the history of Exemption 5 can be understood by means of
"rough analogies."
EPA v. Mink, supra, at
410 U. S. 86.
The legislative history of Exemption 5 indicates that Congress
intended to incorporate governmental privileges analogous to the
Machin privilege. That history recognizes a need for
claims of privilege when confidentiality is necessary to ensure
frank and open discussion, and hence efficient governmental
operations.
See Grolier, 462 U.S. at
462 U. S. 27-28;
Merrill, 443 U.S. at
443 U. S. 359;
Renegotiation Board v. Grumman Aircraft Engineering Corp.,
421 U.S. at
421 U. S. 186,
421 U. S.
189-190;
NLRB v. Sears, Roebuck & Co.,
supra, at
421 U. S.
150-152;
Mink, supra, at
410 U. S. 86-89;
H.R.Rep. No. 1497, 89th Cong., 2d Sess., 10 (1966); S.Rep.
Page 465 U. S. 803
No. 813, 89th Cong., 1st Sess., 9 (1965). [
Footnote 22] The
Machin privilege was
recognized for precisely this reason. [
Footnote 23] Thus, the
Machin privilege is
sufficiently related to the concerns expressed in the legislative
history [
Footnote 24] that
we cannot say that the legislative history demonstrates that the
statute should not be construed to mean what it says with respect
to the
Machin privilege. [
Footnote 25]
Page 465 U. S. 804
We therefore simply interpret Exemption 5 to mean what it says.
The judgment of the Court of Appeals is
Reversed.
[
Footnote 1]
On complaint, the district court of the United States in the
district in which the complainant resides, or has his principal
place of business, or in which the agency records are situated, or
in the District of Columbia, has jurisdiction to enjoin the agency
from withholding agency records and to order the production of any
agency records improperly withheld from the complainant. In such a
case, the court shall determine the matter
de novo, and
may examine the contents of such agency records
in camera
to determine whether such records or any part thereof shall be
withheld under any of the exemptions set forth in subsection (b) of
this section, and the burden is on the agency to sustain its
action.
5 U.S.C. § 552(a)(4)(B) (1982 ed.).
[
Footnote 2]
"This section does not apply to matters that are -- "
"(1) (A) specifically authorized under criteria established by
an Executive order to be kept secret in the interest of national
defense or foreign policy and (B) are in fact properly classified
pursuant to such Executive order;"
"(2) related solely to the internal personnel rules and
practices of an agency;"
"(3) specifically exempted from disclosure by statute (other
than section 552b of this title), provided that such statute (A)
requires that the matters be withheld from the public in such a
manner as to leave no discretion on the issue, or (B) establishes
particular criteria for withholding or refers to particular types
of matters to be withheld;"
"(4) trade secrets and commercial or financial information
obtained from a person and privileged or confidential;"
"(5) inter-agency or intra-agency memorandums or letters which
would not be available by law to a party other than an agency in
litigation with the agency;"
"(6) personnel and medical files and similar files the
disclosure of which would constitute a clearly unwarranted invasion
of personal privacy;"
"(7) investigatory records compiled for law enforcement
purposes, but only to the extent that the production of such
records would (A) interfere with enforcement proceedings, (B)
deprive a person of a right to a fair trial or an impartial
adjudication, (C) constitute an unwarranted invasion of personal
privacy, (D) disclose the identity of a confidential source and, in
the case of a record compiled by a criminal law enforcement
authority in the course of a criminal investigation, or by an
agency conducting a lawful national security intelligence
investigation, confidential information furnished only by the
confidential source, (E) disclose investigative techniques and
procedures, or (F) endanger the life or physical safety of law
enforcement personnel;"
"(8) contained in or related to examination, operating, or
condition reports prepared by, on behalf of, or for the use of an
agency responsible for the regulation or supervision of financial
institutions; or"
"(9) geological and geophysical information and data, including
maps, concerning wells."
5 U.S.C. 552(b) (1982 ed.).
[
Footnote 3]
Air Force Regulations 110-14, � 1(a) (July 18, 1977).
[
Footnote 4]
Air Force Regulations 127-4, � 19(a)(1) (Jan. 1,
1973).
[
Footnote 5]
Id. � 3-8(d) (Jan. 18, 1980).
[
Footnote 6]
Id., � 19(a)(3) (Jan. 1, 1973);
id.
�� 2-4, 2-5 (Jan. 18, 1980).
[
Footnote 7]
Id., � 19(a)(4) (Jan. 1, 1973) states:
"Notwithstanding the restrictions on use of these reports and
their attachments and the prohibitions in this regulation against
their release, factual material included in accident/incident
reports, covering examination of wreckage, photographs, plotting
charts, wreckage diagrams, maps, transcripts of air traffic
communications, weather reports, maintenance records, crew
qualifications, and like nonpersonal evidence may be released as
required by law or pursuant to court order or upon specific
authorization of The Judge Advocate General after consultation with
The Inspector General. Also, Federal law requires that an accused
in a trial by court-martial will, upon proper court order, be
furnished all statements sworn or unsworn in any form which have
been given to any Federal agent, employee, investigating officer,
or board by any witness who testifies against the accused."
[
Footnote 8]
Hoover v. Weber Aircraft Corp., No. CV 74-1064-WPG (CD
Cal.).
[
Footnote 9]
Weber Aircraft Corp.
[
Footnote 10]
Mills Manufacturing Corp.
[
Footnote 11]
"[T]he release of the withheld portions of the Aircraft Mishap
Investigation for litigation purposes would be harmful to our
national security. The strength of the United States Air Force,
upon which our national security is greatly dependent, is seriously
affected by the number of major aircraft accidents which occur. The
successful flight safety program of the United States Air Force has
contributed greatly to the continuously decreasing rate of such
accidents. The effectiveness of this program depends to a large
extent upon our ability to obtain full and candid information on
the cause of each aircraft accident. Much of the information
received from persons giving testimony in the course of an aircraft
mishap investigation is conjecture, speculation and opinion. Such
full and frank disclosure is not only encouraged, but is imperative
to a successful flight safety program. Open and candid testimony is
received because witnesses are promised that, for the particular
investigation, their testimony will be used solely for the purpose
of flight safety, and will not be disclosed outside of the Air
Force. Lacking authority to subpoena witnesses, accident
investigators must rely on such assurances in order to obtain full
and frank discussion concerning all the circumstances surrounding
an accident. Witnesses are encouraged to express personal
criticisms concerning the accident."
"
* * * *"
"If aircraft mishap investigators were unable to give such
assurances, or if it were felt that such promises were hollow,
testimony and input from witnesses and from manufacturers in many
instances would be less than factual, and a determination of the
exact cause factors of accidents would be jeopardized. This would
seriously hinder the accomplishment of prompt corrective action
designed to preclude the occurrence of a similar accident. This
privilege, properly accorded to the described portions of an United
States Air Force Mishap Report of Investigation, including those
portions reflecting the deliberations of the Investigating Board,
is the very foundation of a successful Air Force flight safety
program."
App. 38-39.
[
Footnote 12]
The District Court also held that a medical report sought by
respondents was covered by Exemption 5, and that disclosure of both
the report and the statements was inappropriate because, in its
view, the public interest in maintaining confidentiality outweighed
respondents' interests in obtaining the material. The Court of
Appeals rejected both of these holdings, and the Government does
not seek review on either.
[
Footnote 13]
Weber contends that "intra-agency memorandums or letters" cannot
include statements made by civilians to Air Force personnel.
Whatever the merits of this assertion, it is irrelevant to this
case, since the material at issue here includes only statements
made by Air Force personnel.
[
Footnote 14]
Weber contends that the material at issue is not privileged,
because it was not obtained pursuant to a promise of
confidentiality. However, the District Court found otherwise, and
since that finding is supported by an uncontroverted affidavit
submitted by the Government to the District Court,
see id.
at 38, there is no basis for setting it aside. In all other
respects, respondents concede that the requested material is
covered by the
Machin privilege, and did not file a
cross-petition for certiorari challenging the Court of Appeals'
conclusion that the requested material was privileged. Thus, we
assume without deciding that the material respondents seek is
privileged, and do not consider the arguments of
amici
that no privilege is applicable here.
See United Parcel
Service, Inc. v. Mitchell, 451 U. S. 56,
451 U. S. 60, n.
2 (1981);
Bell v. Wolfish, 441 U.
S. 520,
441 U. S.
531-532, n. 13 (1979);
Knetsch v. United
States, 364 U. S. 361,
364 U. S. 370
(1960).
[
Footnote 15]
See also 462 U.S. at
462 U. S. 28
(BRENNAN, J., concurring in part and concurring in judgment).
[
Footnote 16]
See also 421 U.S. at
421 U. S. 149
(footnote omitted) ("[I]t is reasonable to construe Exemption 5 to
exempt those documents, and only those documents, normally
privileged in the civil discovery context").
[
Footnote 17]
Respondents contend that
Mink stands for the
proposition that purely factual material can never qualify for
protection under Exemption 5. However, the relevant portion of
Mink merely states that otherwise nonprivileged factual
material cannot be withheld under Exemption 5 merely because it
appears in the same document as privileged material, and that
Congress intended to adopt the relevant case law on privilege.
Moreover,
Mink cited
Machin with approval as part
of that case law.
See 410 U.S. at
410 U. S. 87-91,
and n. 14. This reading of
Mink is confirmed by the 1974
amendment to the FOIA, which provides:
"Any reasonably segregable portion of a record shall be provided
to any person requesting such record after deletion of the portions
which are exempt under this subsection."
5 U.S.C. § 552(b) (1982 ed.). This amendment constituted
Congress' codification of this aspect of
Mink.
See S.Rep. No. 93-854, p. 32 (1974); 120 Cong.Rec. 17021
(1974) (remarks of Sen. Hruska).
[
Footnote 18]
Moreover, in the
Merrill dictum, we added:
"We hesitate to construe Exemption 5 to incorporate a civil
discovery privilege that would substantially duplicate another
exemption."
443 U.S. at
443 U. S. 355.
Respondents do not explain how incorporation of the
Machin
privilege into Exemption 5 would substantially duplicate another
exemption. The relevance of the
Merrill dictum is further
reduced by the fact that, in
Merrill, the Court explicitly
reserved the question whether the
Machin privilege falls
within Exemption 5.
See 443 U.S. at
443 U. S.
355-356, n. 17. Thus,
Merrill could hardly
control the question we face today.
[
Footnote 19]
The regulation governing the
Machin privilege also
describes it as executive privilege. Air Force Regulations 127-4,
� 2-5 (Jan. 18, 1980).
[
Footnote 20]
Respondents also argue that their need for the requested
material is great, and that it would be unfair to expect them to
defend the litigation brought against them by Captain Hoover
without access to it. We answered this argument in
Grolier, noting that the fact that, in particular
litigation, a party's particularized showing of need may on
occasion justify discovery of privileged material in order to avoid
unfairness does not mean that such material is routinely
discoverable, and hence outside the scope of Exemption 5.
See 462 U.S. at
462 U. S. 27-28.
Respondents must make their claim of particularized need in their
litigation with Captain Hoover, since it is not a claim under the
FOIA.
[
Footnote 21]
This difficulty is illustrated by the controversy surrounding
the proposed provisions of the Federal Rules of Evidence governing
privileges, which were rejected by Congress.
See generally
2 J. Weinstein & M. Berger, Evidence � 501[01]
(1982).
[
Footnote 22]
Moreover, the Senate Report stated that Exemption 5 had been
drafted in response to comments of federal agencies made in the
course of Committee hearings, S.Rep. No. 813, at 4, 9. During those
hearings, the Government submitted material indicating that the
Machin privilege should be incorporated into the FOIA.
See Administrative Procedure Act: Hearings before the
Subcommittee on Administrative Practice and Procedure of the Senate
Committee on the Judiciary, 89th Cong., 1st Sess., 196, 206,
366-367, 418 (1965).
[
Footnote 23]
"We agree with the Government that, when disclosure of
investigative reports obtained in large part through promises of
confidentiality would hamper the efficient operation of an
important Government program and perhaps even, as the Secretary
here claims, impair the national security by weakening a branch of
the military, the reports should be considered privileged."
114 U.S.App.D.C. at 338, 316 F.2d at 339.
It follows that recognition of the
Machin privilege
would not be inconsistent with the fundamental goals of the FOIA,
since it does not necessarily reduce the amount of information
available to the public. The privilege is recognized because the
Government would not be able to obtain the information but for its
assurance of confidentiality. Thus, much if not all of the
information covered by the
Machin privilege would not find
its way into the public realm even if we refused to recognize the
privilege, since, under those circumstances, the information would
not be obtained by the Government in the first place.
[
Footnote 24]
Cf. Federal Open Market Committee v. Merrill,
443 U. S. 340,
443 U. S.
357-360 (1979) (privilege for Federal Reserve's Open
Market Committee's policy directives sufficiently analogous to
privilege for confidential information concerning Government
contracts mentioned in Exemption 5's legislative history to merit
incorporation into Exemption 5).
[
Footnote 25]
Respondents rely on the fact that, in recent years, Congress has
several times failed to act on proposed legislation which would
have codified the
Machin privilege. However, this does not
represent a rejection of the privilege. To the contrary, Congress
has enacted Federal Rule of Evidence 501, which recognizes the
power of the courts to fashion common law rules of privilege.
Congressional refusal to codify the
Machin privilege
hardly limits the power of courts to recognize the privilege under
Rule 501. Indeed, Rule 501 was adopted precisely because Congress
wished to leave privilege questions to the courts, rather than
attempt to codify them.
See H.R.Rep. No. 93-650, p. 8
(1973); S.Rep. No. 93-1277, pp. 11, 13 (1974);
supra at
465 U. S.
802-803, and n. 21. Congressional failure to codify this
privilege is therefore irrelevant to our inquiry. Respondents also
rely on legislation enacted after Exemption 5 concerning the scope
of Exemption 3 and various other statutes. This legislation
obviously sheds no light on the scope of Exemption 5.