; and other services as authorized by 5 U.S.C. 3109 , at such rates as may be determined by the Commissioner; $3,850,189,000, of which not to exceed $50,000,000 shall remain available until September 30, 2019; of which not to exceed $10,000,000 shall remain available until expended for acquisition of equipment and construction, repair and renovation of facilities; of which not to exceed $1,000,000 shall remain available until September 30, 2020, for research; of which not to exceed $20,000 shall be for official reception and representation expenses: Provided , That not later than 30 days after the end of each quarter, the Internal Revenue Service shall submit a report to the Committees on Appropriations of the House of Representatives and the Senate and the Comptroller General of the United States detailing the cost and schedule performance for its major information technology investments, including the purpose and life-cycle stages of the investments; the reasons for any cost and schedule variances; the risks of such investments and strategies the Internal Revenue Service is using to mitigate such risks