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 head of the Executive branch department, agency, board, or commission 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. 632. (a) None of the funds appropriated or otherwise made available under this Act may be used by departments and agencies funded in this Act to acquire telecommunications equipment produced by Huawei Technologies Company, ZTE Corporation or a high-impact or moderate-impact information system, as defined for security categorization in the National Institute of Standards and Technology’s (NIST) Federal Information Processing Standard Publication 199, Standards for Security Categorization of Federal Information and Information Systems unless the agency has— (1) reviewed the supply chain risk for the information systems against criteria developed by NIST to inform acquisition decisions for high-impact and moderate-impact information systems within the Federal Government