of the Act is to prevent meaningful appellate review of District Court in camera rulings on the exempt status of disputed documents. 484 F.2d at 1096. In this case, the District Court made its ruling that the material in categories (1.) and (3.) was exempt under Exemption 4 on the basis of an in camera inspection without receiving any detailed statement from the Renegotiation Board stating the factual and legal basis for the Board’s claim of exemption. That ruling thus is virtually impossible to review and runs afoul of the purpose of the Vaughn and Cuneo procedures. Therefore, we remand the case for supplementation of the record through compliance by the government with the procedures outlined in Vaughn and Cuneo.
The specific procedures mandated by Vaughn and Cuneo contemplated a detailed indexing of the allegedly exempt material. This procedure would apparently not be revelant to any of the documents in category (1.) but would be relevant to the documents in category (3.). But the Vaughn and Cuneo decisions mandate more than mere indexing of allegedly exempt documents. They contemplate a procedure whereby the agency resisting disclosure must present a “detailed justification”, 484 F.2d at 826, for application of the exemption to the specific documents in dispute. Such a “detailed justification” in this case should include (a.) the extent to which data of the sort in dispute is customarily disclosed to the public, with specific factual or evidentiary material to support the conclusion reached; (b.) the extent to which disclosure of this information will impair the government’s ability to obtain necessary information of this type in the future, with specific factual or evidentiary material to support the conclusion reached; (c.) the extent to which disclosure of the information will cause substantial harm to the competitive position of the person from whom the information is obtained, with specific factual or evidentiary material to support the conclusion reached; and (d.) the extent to which any harms of the type mentioned in (b.) and (c.) could be reduced or eliminated by non-disclosure of the identity of the person submitting the information in dispute. If it is claimed that the information itself discloses to knowledgeable people the identity of the person who supplied it, some factual basis for that conclusion must be advanced to support the Board’s nondisclosure. The appellants should, of course, have an opportunity at a hearing upon the supplementation of the record in this case to dispute any factual or evidentiary assertions made by the government through introduction of oral or written testimony or through factual submissions. Only this “detailed justification” can insure meaningful appellate review of the District Court’s determination that certain documentary material is or is not within Exemption 4.
The applicability of Exemption 5 to the documents in category (2.) is not predicated upon factual issues for which there is no record. Therefore, we need not remand the récord for compliance with Vaughn and Cuneo4 However, there is one additional factual issue not briefed by the parties which seems necessary to full consideration of whether the documents in category (2.) are exempt under Exemption 5. That issue concerns whether the recommendation of the Office of Screening and Exemption contained in Form RB-11 is the sole basis for the decision to issue a Notice of Clearance Without Assignment. Compare American Mail Line, Ltd. v. Gulick, 133 U.S.App.D.C. 382, 411 F.2d 696 (1969) with Washington Research Projetc, Inc. v. Department of HEW, 164 U.S.App.D.C. 169, at 179, 504 F.2d 238, at 248 (1974). See also Grumman Aircraft Engineering Corp. v. Renegotiation Board, 157 U.S.App.D.C. 121, 482 F.2d
4
See Montrose Chem. Corp. v. Train, 160 U.S.App.D.C. 270, 491 F.2d 63 (1974).