; or (C) the expiration of the 10-year period beginning upon the Secretary obligating such amounts to the grantee, as such period may be extended pursuant to paragraph (2), the Secretary shall transfer such unexpended amounts to the Secretary of the Treasury for deposit into the Community Development Block Grant Disaster Recovery Reserve Fund established under section 124, except that the Secretary may, by regulation, permit the grantee to retain amounts needed to close out the grant. (2) Extension of period for use of funds The period under paragraph (1)(C) shall be extended by not more than 3 years if the Secretary waives this requirement and submits a written justification for the waiver to the Committees on Appropriations of the House of Representatives and the Senate that specifies the period of that extension. 124. Community Development Block Grant Disaster Recovery Reserve Fund (a) Establishment There is established in the Treasury of the United States an account to be known as the Community Development Block Grant Disaster Recovery Reserve Fund (in this section referred to as the Fund ). (b) Amounts (1) In general There are authorized to be appropriated to the Fund such sums as may be necessary to carry out the activities authorized under this Act, to remain available until expended, except that not more than $50,000,000 is authorized to be appropriated for the first fiscal year beginning after the date that is 1 year after the date of enactment of this section, and each fiscal year thereafter. (2) Transfer Amounts made available through section 106(c)(4) by actions taken under section 104(e) or 111 may be transferred to the Fund, to remain available until expended. (c) Use (1) In general Except as provided in paragraph (2), amounts in the Fund shall be available only for providing assistance under section 123, but only to the extent provided in advance in appropriations Acts. (2) Homelessness assistance (A) In general An amount determined by the Secretary, based on available data from the impacted area