; and (iii) requires the United States Government to receive semiannual reports on expenditure of funds, if any, by the Government of Israel, including a description of what the funds have been used for, when funds were expended, and an identification of entities that expended the funds. (b) Support in connection with the program (1) In general The Secretary of Defense is authorized to provide maintenance and sustainment support to Israel for the research, development, test, and evaluation activities authorized in subsection (a)(1). Such authority includes authority to install equipment necessary to carry out such research, development, test, and evaluation. (2) Report Support may not be provided under paragraph (1) until 15 days after the Secretary submits to the appropriate committees of Congress a report setting forth a detailed description of the support to be provided. (3) Matching contribution (A) In general Except as provided in subparagraph (B), support may not be provided under this subsection unless the Government of Israel contributes an amount not less than the amount of support to be so provided to the program, project, or activity for which the support is to be so provided in the calendar year in which the support is provided. (B) Exception Subject to paragraph (4), the Secretary may use amounts available to the Secretary in excess of the amount contributed by the Government of Israel to provide support under this subsection for costs associated with any unique national requirement identified by the United States with respect to countering unmanned aerial systems. (4) Annual limitation on amount The amount of support provided under this subsection in any year may not exceed $25,000,000. (5) Use of certain amounts for RDT&E activities in the United States Of the amount provided by the United States in support under paragraph (1), not less than 50 percent of such amount shall be used for research, development, test, and evaluation activities in the United States in connection with such support. (c)