5 U.S.C. § 421: Additional provisions with respect to the Department of Energy

The Secretary of Energy may prohibit the Inspector General of the Department of Energy from accessing Restricted Data and nuclear safeguards information protected from disclosure under chapter 12 of the Atomic Energy Act of 1954 ( 42 U.S.C. 2161 et seq.) and intelligence or counterintelligence, as defined in section 3 of the National Security Act of 1947 ( 50 U.S.C. 3003 ), if the Secretary of Energy determines that the prohibition is necessary to protect the national security or prevent the significant impairment to the national security interests of the United States. Not later than 7 days after the date on which the Secretary of Energy exercises any power authorized under subsection (a), the Secretary shall notify the Inspector General of the Department of Energy in writing of the reasons for such exercise. Within 30 days after receipt of any such notice, the Inspector General of the Department of Energy shall submit to the appropriate committees of Congress a statement concerning such exercise.