; $333,630,000: Provided , That not to exceed $8,280 is for official reception and representation expenses: Provided further , That contracts may be entered into under this heading in fiscal year 2019 for maintenance and operation of facilities and for other services to be provided during the next fiscal year. Office of the national science board For necessary expenses (including payment of salaries, authorized travel, hire of passenger motor vehicles, the rental of conference rooms in the District of Columbia, and the employment of experts and consultants under section 3109 of title 5, United States Code) involved in carrying out section 4 of the National Science Foundation Act of 1950 ( 42 U.S.C. 1863 ) and Public Law 86–209 ( 42 U.S.C. 1880 et seq.), $4,370,000: Provided , That not to exceed $2,500 shall be available for official reception and representation expenses. Office of inspector general For necessary expenses of the Office of Inspector General as authorized by the Inspector General Act of 1978, $15,350,000, of which $400,000 shall remain available until September 30, 2020. Administrative provisions (including transfer of funds) Not to exceed 5 percent of any appropriation made available for the current fiscal year for the National Science Foundation in this Act may be transferred between such appropriations, but no such appropriation shall be increased by more than 10 percent by any such transfers. Any transfer pursuant to this paragraph shall be treated as a reprogramming of funds under section 505 of this Act and shall not be available for obligation except in compliance with the procedures set forth in that section. The Director of the National Science Foundation shall notify the Committees on Appropriations of the House of Representatives and the Senate at least 30 days in advance of the acquisition or disposal of any capital asset (including land, structures, and equipment) not specifically provided for in this Act or any other law appropriating funds for the National Science Foundation. This