investigation in criminal cases or otherwise. Doing so would amount to an unwarranted intrusion into personal liberty. However, we do leave room for the voluntary administration of the impugned techniques in the context of criminal justice, provided that certain safeguards are in place. Even when the subject has given consent to undergo any of these tests, the test results by themselves cannot be admitted as evidence because the subject does not exercise conscious control over the responses during the administration of the test. However, any information or material that is subsequently discovered with the help of voluntary administered test results can be admitted, in accordance with Section 27 of the Evidence Act, 1872. The National Human Rights Commission had published Guidelines for the Administration of Polygraph Test (Lie Detector Test) on an Accused' in 2000. These guidelines should be strictly adhered to and similar safeguards should be adopted for conducting the Narcoanalysis technique' and the `Brain Electrical Activation Profile' test. The text of these guidelines has been reproduced below: