; 22 U.S.C. 254a note) is amended by striking the number and inserting a best estimate . 718. Semiannual reports on investigations of unauthorized disclosures of classified information (a) In general Title XI of the National Security Act of 1947 ( 50 U.S.C. 3231 et seq.) is amended by adding at the end the following new section: 1105. Semiannual reports on investigations of unauthorized disclosures of classified information (a) Definitions In this section: (1) Covered official The term covered official means— (A) the heads of each element of the intelligence community