In this action under the Freedom of Information Act (“FOIA”), plaintiff appeals an award of summary judgment in the United States District Court for the Southern District of New York (George B. Daniels, Judge) in favor of defendant, arguing that the district court erred in concluding that requiring defendant to substitute Unique Identifying Numbers (“Unique IDs”) for FOIA-exempt agency Alien Identification Numbers (“A-Numbers”) in order to afford plaintiff access to non-exempt agency records in a person-centric manner constituted the impermissible creation of new records. In the particular circumstances of this case, we reject the district court’s conclusion. A government agency cannot make an exempt record (here, A-Numbers), the sole “key” or “code” necessary to access non-exempt records in a particular manner; itself use the exempt record to obtain non-exempt records in that manner; and then invoke the record’s exempt status to deny the public similar access to the non-exempt records. Where an agency chooses to assign exempt records such a code function within its computer system, FOIA’s broad disclosure policy obligates the agency to substitute a different code in order to afford the public non-exempt records in the same manner as they are available to the agency. That conclusion particularly obtains here, where the substitute code can be neutral Unique IDs consisting of any combinations of numbers, letters, or symbols that are meaningless in themselves and that function only to afford access to the non-exempt records in the requested manner. REVERSED AND REMANDED. REENA RAGGI, C.J. Plaintiff American Civil Liberties Union Immigrants’ Rights Project (“ACLU”) brought this Freedom of Information Act (“FOIA”) suit in the United States District Court for the Southern District of New York (George B. Daniels, Judge) to compel defendant, United States Immigration and Customs Enforcement (“ICE”), to produce agency records in the form of electronic spreadsheet data pertaining to five stages of the immigration enforcement and deportation process. While ICE produced 21 spreadsheets of responsive data, the agency did not comply with ACLU’s request to replace exempt Alien Identification Numbers (“A-Numbers”)1 on such spreadsheets with anonymized unique identifiers (“Unique IDs”). ACLU submits that such Unique IDs could be any combinations of numbers, letters, or symbols that, while meaningless in themselves, would allow ACLU to track datapoints pertaining to individual (but unidentified) aliens across ICE databases. On March 10, 2021, the district court granted ICE’s motion for summary judgment, ruling that ACLU’s requested substitution effectively required ICE to create new records, something the court was powerless to order under FOIA. See ACLU Immigrants’ Rts. Project v. ICE, No. 19-CV-7058, 2021 WL 918235 (S.D.N.Y. Mar. 10, 2021). For the reasons stated herein, we conclude that ICE was not entitled to summary judgment in the particular circumstances of this case. In reaching that conclusion, we are mindful that ICE has chosen to organize its electronic databases by immigration events (e.g., arrests, detentions, deportations, etc.), rather than by individual aliens.2 We are further mindful that ICE has chosen — although it was not required — to have FOIA-exempt A-Numbers function as the sole “key” or “code” affording access to electronic data pertaining to individual aliens from its event-centric databases, and that ICE itself uses A-Numbers for that purpose. Thus, by here redacting A-Numbers from the spreadsheets it produced conveying datapoints by event rather than by person, ICE not only shielded the FOIA-exempt personal identifying information (“PII”) documented by the A-Numbers, but also effectively deprived the public of access to non-exempt records in the same person-centric manner available to the agency. In these circumstances, we approve the substitution of neutral Unique IDs for exempt A-Numbers. Such substitution does not alter the content of any record, but only preserves the computer function necessary to afford the public access to non-exempt electronic records in the same manner that they are available to the agency. Accordingly, we reverse the award of summary judgment to ICE, and we remand the case for further proceedings consistent with this opinion. BACKGROUND The following facts derive largely from the sworn declaration of Donna Vassilio-Diaz, Unit Chief of the Statistical Tracking Unit within Enforcement and Removal Operations Law Enforcement and Systems Analysis at ICE, submitted in support of ICE’s motion for summary judgment, as well as from matters of which the court may take judicial notice. In FOIA cases, we accord such declarations “a presumption of good faith,” Carney v. DOJ, 19 F.3d 807, 812 (2d Cir. 1994) (internal quotation marks omitted), and can rely on them to support an award of summary judgment, at least to the extent “they are not called into question by contradictory evidence in the record or by evidence of agency bad faith,” Grand Cent. P’ship, Inc. v. Cuomo, 166 F.3d 473, 478 (2d Cir. 1999) (internal quotation marks omitted). I. ICE Databases Some understanding of certain ICE databases is useful to our discussion of the issues on appeal. ICE’s Enforcement Integrated Database (“EID”) is the agency’s “common database repository for all records created, updated, and accessed by a number of software applications.” Vassilio-Diaz Decl. 6. EID allows ICE officials, along with other law-enforcement components of the Department of Homeland Security, “to manage cases from the time of an alien’s arrest, in-processing, or placement into removal proceedings, through the final case disposition.” Id. EID, however, does not store data on a person-centric basis; rather, it stores data in an event-centric manner. Thus, when a particular enforcement event occurs, ICE officers enter it into EID where it is stored with data recording similar events rather than with data pertaining to the same alien. Nevertheless, ICE software does permit the agency to retrieve EID data on a person-centric basis. Specifically, with an appropriate identifier — here the alien’s A-Number — ICE can search on an ad hoc basis for all events pertaining to that particular alien. Another ICE database, the Integrated Decision Support System (“IIDS”), contains a subset of data from EID, maintained in “distinct data sets[,] which capture populations of aliens at various points in the removal lifecycle.” Id. 12. Thus, it too is event-centric, with data pertaining to categories of events, e.g., removals, detentions, administrative arrests, stored separately within IIDS. Updated regularly, IIDS functions as a “snapshot” of EID. Id.
