; or (III) any other method that is identified in any amendment made to this Act; or (ii) an area that has a 0.2 percent chance of flooding in a year; and (B) rely on— (i) the best available information; and (ii) the Flood Insurance Rate Map published by the Administrator for the community in which the agency action shall take place. (3) Procedures The procedures described in this paragraph are as follows: (A) Before an agency takes an agency action, the head of the agency shall determine under paragraph (2) whether the proposed agency action will take place in a floodplain. (B) If an agency action described in subparagraph (A) may have a significant effect on the quality of the human environment, the evaluation required under paragraph (5) shall be included in any statement prepared under section 102(2)(C) of the National Environmental Policy Act ( 42 U.S.C. 4332(2)(C) ). (C) If the head of an agency has determined to, or proposes to, conduct, support, or allow an agency action that will take place in a floodplain, as determined under paragraph (2), the head of the agency shall— (i) consider alternatives in order to avoid adverse effects and incompatible development in the floodplain; (ii) when possible, rely on natural systems, ecosystem processes, and nature-based approaches when considering alternatives under clause (i); (iii) if the head of the agency determines that the only practicable alternative consistent under law, including the requirements of this Act, requires taking an agency action in a floodplain, before taking the agency action— (I) design or modify the agency action to minimize potential harm to or within the floodplain consistent with regulations issued under paragraph (6); and (II) prepare and distribute a notice that contains an explanation with respect to why the agency action shall take place in the floodplain