eminent domain. 408. None of the funds made available in this Act may be transferred to any department, agency, or instrumentality of the United States Government, except pursuant to a transfer made by, or transfer authority provided in, this Act or any other appropriations Act. 409. No funds appropriated pursuant to this Act may be expended by an entity unless the entity agrees that in expending the assistance the entity will comply with sections 2 through 4 of the Act of March 3, 1933 ( 41 U.S.C. 8301–8305 , popularly known as the Buy American Act ). 410. No funds appropriated or otherwise made available under this Act shall be made available to any person or entity that has been convicted of violating the Buy American Act ( 41 U.S.C. 8301–8305 ). 411. None of the funds made available in this Act may be used for first-class airline accommodations in contravention of sections 301–10.122 and 301–10.123 of title 41, Code of Federal Regulations. 412. None of the funds made available in this Act may be used to send or otherwise pay for the attendance of more than 50 employees of a single agency or department of the United States Government, who are stationed in the United States, at any single international conference unless the relevant Secretary reports to the House and Senate Committees on Appropriations at least 5 days in advance that such attendance is important to the national interest: Provided, That for purposes of this section the term international conference shall mean a conference occurring outside of the United States attended by representatives of the United States Government and of foreign governments, international organizations, or nongovernmental organizations. 413. None of the funds appropriated or otherwise made available under this Act may be used by the Surface Transportation Board to charge or collect any filing fee for rate or practice complaints filed with the Board in an amount in excess of the amount authorized for district court civil suit filing fees under section 1914 of title 28,