awards or incentive fees are consistent with section 16.401(e)(2) of the Federal Acquisition Regulation. 627. (a) None of the funds made available under this Act may be used to pay for travel and conference activities that result in a total cost to an Executive branch department, agency, board or commission funded by this Act of more than $500,000 at any single conference unless the agency or entity determines that such attendance is in the national interest and advance notice is transmitted to the Committees on Appropriations of the House of Representatives and the Senate that includes the basis of that determination. (b) None of the funds made available under this Act may be used to pay for the travel to or attendance of more than 50 employees, who are stationed in the United States, at any single conference occurring outside the United States unless the agency or entity determines that such attendance is in the national interest and advance notice is transmitted to the Committees on Appropriations of the House of Representatives and the Senate that includes the basis of that determination. 628. None of the funds made available by this Act may be used for first-class or business-class travel by the employees of executive branch agencies funded by this Act in contravention of sections 301–10.122 through 301–10.125 of title 41, Code of Federal Regulations. 629. None of the funds made available by this Act may be obligated on contracts in excess of $5,000 for public relations, as that term is defined in Office and Management and Budget Circular A–87 (revised May 10, 2004), unless advance notice of such an obligation is transmitted to the Committees on Appropriations of the House of Representatives and the Senate. 630. Federal agencies funded under this Act shall clearly state within the text, audio, or video used for advertising or educational purposes, including emails or Internet postings, that the communication is printed, published, or produced and disseminated at U.S. taxpayer expense. The funds used by a