; (B) signs a nondisclosure agreement with regard to such classified information; and (C) is authorized to receive documents, writings, code books, signal books, sketches, photographs, photographic negatives, blueprints, plans, maps, models, instruments, appliances, or notes of anything connected with the national defense by— (i) the President; or (ii) the head of a department or agency of the United States Government which is expressly designated by the President to engage in activities relating to the national defense; and (2) the term foreign agent — (A) has the meaning given the term agent of a foreign power under section 101 of the Foreign Intelligence Surveillance Act of 1978 ( 50 U.S.C. 1801 ); and (B) does not include a person who is an agent of a foreign power (as so defined) with respect to a foreign power described in section 101(a)(5) of the Foreign Intelligence Surveillance Act of 1978 ( 50 U.S.C. 1801(a)(5) ). . (b) Obtaining or receiving defense information Section 793(c) of title 18, United States Code, is amended— (1) by striking Whoever and inserting A foreign agent who ; (2) by inserting and with like intent or reason to believe, after aforesaid,