November 2002: CIA Approves Four Standard Interrogation Techniques

The CIA approves four standard interrogation techniques for use against detainees. The techniques are:
Sleep deprivation, which should not exceed 72 hours;
Continual use of light or darkness in a cell;
Loud music; and
White noise, meaning a background hum.
These standard techniques can be used in addition to 10 enhanced techniques such as waterboarding (see Mid-March 2002). The limit on sleep deprivation as a standard technique will later be reduced (see December 2003), although when the tactic is used as an enhanced technique the maximum is 11 days. [Central Intelligence Agency, 5/7/2004, pp. 15, 40 ]