The Court of Appeals for the D.C. Circuit has ruled that the FBI may withhold a memo prepared by the Office of Legal Counsel concerning the law governing "exigent letter" requests to telephone companies for call records. The decision affirmed an earlier opinion that the memo was privileged advice, and exempt from disclosure under the Freedom information Act. The Electronic Frontier Foundation argued that the memo was "working law" and not simply advice from government lawyers. However, the Court of Appeals found that the FBI had not itself adopted the advice of government lawyers. In a different case where the Department of State followed the guidance of Justice Department lawyers, EPIC filed a "friend" of the court brief in support of the New York Times and the ACLU and argued for the release of opinions of the Office of Legal Counsel. For more information, see EPIC v. NSA: Cybersecurity Authority and EPIC: New York Times v. DOJ.