Alessio Bruni of Italy, a member of the United Nations committee, pressed the delegation to explain Appendix M of the manual, which contains special procedures for separating captives in order to prevent them from communicating. The appendix says that prisoners shall receive at least four hours of sleep a day — an amount Mr. Bruni said would be sleep deprivation over prolonged periods and unrelated to preventing communication.
Brig. Gen. Richard C. Gross, the top legal adviser to the Joint Chiefs of Staff, said that reading the appendix as intended to permit sleep deprivation was a misinterpretation. Four hours is “a minimum standard; it’s not the maximum they can get,” he said, adding that the rule had to be read in the context of the rest of the manual, including a requirement for medical and legal monitoring of treatment “to ensure it is humane, legal and so forth.”
Mr. Bruni was not persuaded. He said that calling the provision a minimum standard still meant four hours a night for long periods was “permissible.” He suggested that Appendix M “be simply deleted.”
In the presentation, streamed live online from Geneva, the committee also scrutinized whether the United States had adequately investigated the
C.I.A.’s Bush-era “rendition, detention and interrogation” program for high-level suspects linked to Al Qaeda.
A provision of the treaty, the Convention Against Torture, requires parties to investigate and provide accountability for past instances of torture. The American delegation said that the United States had investigated the C.I.A. program, and that the coming publication of a Senate Intelligence Committee report would add to the public record.
“Our goal is to move forward, but we know that to avoid falling backward, we must be willing to look backward and to come to terms with what happened in the past,” said Tom Malinowski, the assistant secretary of state for human rights.