; (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 ; and (3) by adding at the end the following new paragraph: (2) offer a reduction of the risk premium rate charged to a policyholder, as determined by the Administrator, if the policyholder implements any mitigation method described in paragraph (1). . 7. Provision of Community Rating System premium credits to maximum number of communities practicable Subsection (b) of section 1315 of the National Flood Insurance Act of 1968 ( 42 U.S.C. 4022(b) ) is amended— (1) in paragraph (2), by striking may and inserting shall