; or (ii) a property that— ; (4) by striking under this title for any property and inserting the following: under this title— (i) for any property ; (5) by inserting (A) subject to subparagraph (B), after the paragraph designation; and (6) by inserting before subparagraph (B), as so redesignated by the amendment made by paragraph (3)(C) of this section, the following new clause: (ii) for any residential property having 4 or fewer residences and for which a valid National Flood Insurance Program Elevation Certificate has been filed with the National Flood Insurance Program within the proceeding calendar year, may not exceed $10,000 in any single year, except that such amount (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 the National Flood Insurance Program Policyholder Protection Act of 2017 and upon the expiration of each successive 5-year period thereafter, in accordance with an inflationary index selected by the Administrator. . 3. Premium rates for certain mitigated properties (a) Mitigation strategies Paragraph (1) of section 1361(d) of the National Flood Insurance Act of 1968 ( 42 U.S.C. 4102(d)(1) ) is amended— (1) in subparagraph (A), by striking and at the end; (2) in subparagraph (B), by striking and at the end; and (3) by inserting after subparagraph (B) the following new subparagraphs: (C) with respect to buildings in dense urban environments, methods that can be deployed on a block or neighborhood scale; and (D) elevation of mechanical systems; and . (b) Mitigation credit Subsection (k) of section 1308 of the National Flood Insurance Act of 1968 ( 42 U.S.C. 4015(k) ) is amended— (1) by striking shall take into account and inserting the following: shall— (1) take into account ; (2) in paragraph (1), as so designated by the amendment made by paragraph (1) of this subsection, by striking the period at the end and inserting ; and