An OLC memo to the CIA addressing whether the use of "twelve particular interrogation techniques (attention grasp, walling, facial hold, facial slap (insult slap), cramped confinement, wall standing, stress positions, sleep deprivation, dietary manipulation, nudity, water dousing, and abdominal slap in the interrogation of Sharif al-Masri would violate any United States Statute (including 18 U.S.C. §2340A), the United States Constitution, or any treaty obligation of the United States." The letter concludes that "the use of these techniques on al-Masri outside territory subject to United States jurisdiction would not violate any of these provisions."