The Bureau of Alcohol, Tobacco and Firearms appeals the district court’s order requiring it to disclose, pursuant to the Freedom of Information Act, 5 U.S.C. §§ 552 et seq. certain portions of its manual entitled “Raids and Searches *655 Training-Criminal Enforcement).” We reverse and remand.
This suit was brought under the Freedom of Information Act by an attorney, David T. Hardy, who sought disclosure of the manual, “Raids and Searches,” allegedly for research purposes. On Hardy’s initial request the Bureau had disclosed parts of the manual, but had withheld portions concerning techniques used in making law enforcement raids and in conducting searches. The Bureau submitted a detailed affidavit to the district court outlining the subject of each withheld portion; the affidavit explained how disclosurе would enable violators to evade or hinder law enforcement personnel. The Bureau claimed that these portions were exempt under 5 U.S.C. § 552(b)(2). The district court disagreed but used its equitable powers to protect certain of the withheld portions from disclosure on the theory that disclosure would “significantly impede the enforcement process.” The court ordered the Bureau to disclose the rest of the withheld portions.
I.
Because we hold that the contested portions of the manual are exempt under 5 U.S.C. § 552(b)(2), we need not decide whether a court can properly use its equitable powers to prеvent disclosure of government records not specifically exempted by the Freedom of Information Act. 1
II.
We base our holding on 5 U.S.C. § 552(b)(2). Under this provision, referred to as “Exemption 2,” an agency may refuse to disclose materials “related solely to the internal personnel rules and practices of an agency.” From its wording, this exemption would appear to apply to the contested portions of thе manual here, were it not for the differing interpretations given by the reports of the two Houses of Congress.
See Caplan v. Bureau of Alcohol, Tobacco & Firearms,
Exemption No. 2 relates only to the internal personnel rules and practices of an agency. Examples of these may be rules as to personnel’s use of parking facilities or regulation of lunch hours, statements of policy as to siсk leave, and the like.
S.Rep.No.813, 89th Cong., 1st Sess. 8 (1965). The House report states:
2. Matters related solely to the internal personnel rules and practices of any agency: Operating rules, guidelines, and manuals of рrocedure for Government investigators or examiners would ' be exempt from disclosure, but this exemption would not cover all “matters of internal management” such as employee relations and working conditions and routine administrative procedures which are withheld under present law.
H.R.Rep.No.1497, 89th Cong., 2d Sess. 10, reprinted in [1966] U.S. Code Cong. & Ad. News 2418, 2427. The Senate report could be read to limit the exemption to trivial matters while the House report indicates that the exemption would cover the materials contested here.
Supreme Court guidance on interpreting this exemption is found in
Department of Air Force v. Rose,
*656 In sum, we think that, at least where the situation is not one where disclosure may risk circumvention of agency regulation, Exemption 2 is not applicable to matters subject to such a genuine and significant public interest.
Id.
at 369,
While no circuit has considered the specific issue which squarely confronts us, five other circuits have considеred whether materials similar to those contested here would be subject to disclosure. They have all indicated that such materials would not be subject to disclosure.
See Caplan v. Bureau of Alcohol, Tobacco & Firearms,
Our interpretation is buttressed by the 1967 amendment to § 552(b)(7). That amendment exemрts investigatory records to the extent that production would “disclose investigatory techniques and procedures.” This exemption would be pointless unless the manuals instructing agents in those techniques and procеdures were also exempt from disclosure.
In adopting the Second Circuit’s interpretation of the act, we necessarily reject those of the District of Columbia and Eighth Circuits. While the District of Columbia Circuit has held thаt similar materials are exempt under Exemption 2, it based its decision not on the risk of circumvention of agency regulation but on the ground that they are materials “in which the public could not reasonably be exрected to have a legitimate interest.”
Cox v. United States Dept. of Justice,
The Eighth Circuit has held, and the Fifth and Sixth Circuits have indicated, that law enforcеment materials need not be disclosed because they are not included in 5 U.S.C. § 552(a)(2)(C).
Cox v. Levi,
592 F.2d
*657
460, 463 (8th Cir. 1979);
Cox v. United States Dept. of Justice,
III.
We hold that law enforcement materials, disclosure of which may risk circumvention of agency regulation, are exempt from disclosure. In so ruling we recognize the distinction between “law enforcement” and “administrative” materials.
See, e.g., Hawkes v. Internal Revenue Service,
IV.
When an agency believes that materials sought in a Freedom of Information Act suit are within the exempt category of law enforcement materials herein described, it should submit to the district court a detailed affidavit describing how disclosure would risk circumvention of agency regulation.
See Cuneo
v.
Schlesinger,
We remand to the district court for a review of the affidavit of the Bureau and the contested portions of the manual to determine whеther they involve law enforcement material, the disclosure of which would risk circumvention of agency regulation. If so, the material is exempt from disclosure.
Reversed and remanded.
Notes
. Although language in some of our opinions suggests aрproval of the use of equitable powers in Freedom of Information Act cases,
e.g. Theriault v. United States,
.
But see Jordan
v.
Department of Justice,
. These circuits have defined the category of law enforcement materials that need not be disclosed as those disclosure of which would significantly impede the enforcement process. The Sixth Circuit has stated that enforcement is significantly impeded “only when information is made available which allows persons simultaneously to violate the law and to avoid detection.”
Hawkes v. Internal Revenue Service,
