; (B) de minimis contact with an agency shall be cause for a waiver of subsection (a)(2); and (C) any waiver shall take effect when the certification is published in the Federal Register, accompanied by a signed statement by the Director describing in detail the reasons for providing the waiver unless such a description would compromise national security. (c) (1) In this section, the term lobbying activity means, with respect to an individual, knowingly making, with the intent to influence, any communication to or appearance before any officer or employee of the Federal Government on behalf of another person as an employee of a lobbying firm or lobbying organization, in connection with any matter on which such person seeks official action by such officer or employee of the Federal Government. The previous sentence applies only with respect to an individual who spends greater than 20% of the individual’s time as an employee of a lobbying firm or lobbying organization engaged in such lobbying activity. (2) In paragraph (1), the term lobbying firm means any firm, corporation, or limited liability company in which— (A) employees of the firm in the aggregate make 2 or more lobbying contacts at any time on behalf of a particular client; and (B) the firm receives or expects to receive from a particular client for matters related to lobbying activities at least the amount specified in section 4(a)(3)(A) of the Lobbying Disclosure Act of 1995 ( 2 U.S.C. 1603(a)(3)(A) ) in the quarterly period during which registration would be made under such Act. (3) In paragraph (1), the term lobbying organization includes any organization in which— (A) employees of the firm in the aggregate make 2 or more lobbying contacts at any time on its behalf