; (4) the term lobbyist has the meaning given such term by section 3 of the Lobbying Disclosure Act of 1995 ( 2 U.S.C. 1602 ); and (5) the term foreign principal has the meaning given such term by section 1(b) of the Foreign Agents Registration Act of 1938 ( 22 U.S.C. 611(b) ). (e) Rule of construction Nothing in this section shall be considered to prevent the payment of— (1) any lump-sum credit, as defined by section 8331(8) or 8401(19) of title 5, United States Code, to which an individual is entitled; or (2) any amount in the account of an individual in the Thrift Savings Fund which, as of the date on which paragraphs (1) and (2) of subsection (a) are first met with respect to such individual, is nonforfeitable. (f) Regulations Any regulations necessary to carry out this section may be prescribed— (1) except as provided in paragraph (2), by the Director of the Office of Personnel Management; and (2) to the extent that this Act relates to the Thrift Savings Plan, by the Executive Director (as defined by section 8401(13) of title 5, United States Code).