Pub. L. 109-108, tit. VI, sec. 634

Sec. 634. 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 agencies or departments of the United States Government who are stationed in the United States, at any single international conference occurring outside the United States, unless the Secretary of State determines that such attendance is in the national interest: Provided, That for purposes of this section the term “international conference” shall mean a conference attended by representatives of the United States Government and representatives of foreign governments, international organizations, or nongovernmental organizations. 119 STAT. 2346