; minus (ii) the amount such sponsoring organization of a family or group day care home was reimbursed under such section for administrative funds for such reimbursement month. (4) Treatment of funds (A) Availability Funds allocated to a State under paragraph (1)(A) shall remain available until March 30, 2021. (B) Unaffiliated center In the case of a covered institution or a new covered institution that is an unaffiliated center that is sponsored by a sponsoring organization and receives funds for a reimbursement month under subparagraph (A) or (B), such unaffiliated center shall provide to such sponsoring organization an amount of such funds as agreed to by the sponsoring organization and the unaffiliated center, except such amount may not be greater than 15 percent of such funds. (C) Administrative expenses A State may reserve not more than 1 percent of the funds allocated under paragraph (1)(A) for administrative expenses to carry out this subsection. (D) Unexpended balance On September 30, 2021, any amounts allocated to a State under paragraph (1)(A) or reimbursed to a new covered institution, covered institution, new sponsoring organization of a family or group day care home, or sponsoring organization of a family or group day care home that are unexpended by such State, new covered institution, covered institution, new sponsoring organization of a family or group day care home, or sponsoring organization of a family or group day care home, shall revert to the Secretary. (5) Reports Each State that carries out a reimbursement program under paragraph (3) shall, not later than September 30, 2021, submit a report to the Secretary that includes a summary of the use of such funds by the State and each new covered institution, covered institution, new sponsoring organization of a family or group day care home, or sponsoring organization of a family or group day care home. (b) Definitions In this section: (1) Child care operational emergency costs The term child care operational emergency costs means the costs