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 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. . (b) Regulations (1) Proposed rules Not later than 6 months after the date of the enactment of this Act, the Secretary of Housing and Urban Development shall issue proposed rules to carry out sections 123 and 124 of the Housing and Community Development Act of 1974, as added by the amendment made by subsection (a) of this section, and shall provide a 90-day period for submission of public comments on those proposed rules. (2) Final rules Not later than 1 year after the date of the enactment of this Act, the Secretary of Housing and Urban Development shall issue final regulations to carry out sections 123 and 124 of the Housing and Community Development Act of 1974, as added by the amendment made by subsection (a) of this section. 3. GAO report Not later than 180 days after the date of enactment of this Act, the Comptroller General of the United States shall submit to Congress a report on the hazard mitigation grant program authorized under section 404 of the Robert T. Stafford Disaster Relief and Emergency Assistance Act ( 42 U.S.C. 5170c ) (in this section referred to as the program ), which shall include— (1) an assessment of the utilization of the program for acquisition of flood-prone properties for hazard mitigation, including an analysis of the average