to target the acquisition of critical technologies, critical materials, or critical infrastructure. (C) Any economic espionage efforts directed at the United States by a foreign country, particularly such a country of special concern. 718. Modification of certain reporting requirement on travel of foreign diplomats Section 502(d)(2) of the Intelligence Authorization Act for Fiscal Year 2017 ( Public Law 115–31 ) is amended by striking the number and inserting a best estimate . 719. 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