US Secretary of State Condoleezza Rice said in Kiev during her visit to Europe: "As a matter of US policy, the United States obligations under the [convention] which prohibits, of course, cruel and inhumane and degrading treatment, those obligations extend to US personnel wherever they are, whether they are in the United States or outside of the United States."
The US is signatory to the 1984 UN 'Convention against Torture and other Cruel, Inhuman and Degrading Treatment or Punishment'. However due to the convention's ambiguity in wording; the definition of torture, cruel and degrading treatment in the US's interpretation excludes certain techniques.