; (B) an expenditure that, in the case of a lodging establishment located in the United States, the Secretary of Homeland Security, or, in the case of an establishment located outside of the United States, the Secretary of State, determines is necessary for purposes of providing— (i) humanitarian assistance; or (ii) disaster relief or other urgent life-saving measures; or (C) an expenditure by an agency at a covered establishment that is the only lodging establishment that would meet statutory or regulatory requirements for lodging or other expenses during official travel, if, with respect to an expenditure by— (i) an agency described in subsection (a)(1)(A), a written waiver is issued by the designated agency ethics official (as defined in section 109 of the Ethics in Government Act of 1978 (5 U.S.C. App.)) of the agency; (ii) an office, agency, or other establishment in the Senate, a written waiver is issued by an official designated by the Select Committee on Ethics of the Senate; (iii) an office, agency, or other establishment in the House of Representatives, a written waiver is issued by an official designated by the Committee on Ethics of the House of Representatives; (iv) an agency described in subsection (a)(1)(B) that is not in the Senate or the House of Representatives, a written waiver is issued by an official designated by the head of the agency