by adding at the end the following new subsections: (f) Reducing future risks of the National Flood Insurance Fund (1) Prohibition of new coverage for high-risk properties Except as provided in subsection (g) and notwithstanding any other provision of this title, in carrying out the fiduciary responsibility to the National Flood Insurance Program under section 1309(e) ( 42 U.S.C. 4016(e) ) and to reduce future risks to the National Flood Insurance Fund, on or after January 1, 2021, the Administrator may not make available flood insurance coverage under this title as follows: (A) New structures added to flood hazard zones Any new coverage for any property for which new construction is commenced on or after such date and that, upon completion of such construction, is located in an area having special flood hazards. (B) Structures with high-value replacement costs Any new or renewed coverage for any residential property having 4 or fewer residences and a replacement value of the structure, at the time, exclusive of the value of the real estate on which the structure is located, of $1,000,000 or more (as such amount is adjusted pursuant to clause (i)), subject to the following provisions: (i) Adjustment of amounts The dollar amount in the matter of this subparagraph that precedes this clause (as it may have been previously adjusted) shall be adjusted for inflation by the Administrator upon the expiration of the 5-year period beginning upon the enactment of this subsection and upon the expiration of each successive 5-year period thereafter, in accordance with an inflationary index selected by the Administrator. (ii) Valuation The Administrator shall determine the replacement value of a property for purposes of this subparagraph using such valuation methods or indicia as the Administrator determines are reasonably accurate, consistent, reliable, and available for such purposes. (2) Actuarial structures with hidden risks For any property with risk premium rates estimated under section 1307(a)(1), on or after January 1,