; and (D) in paragraph (3) (as so redesignated), by striking this subsection and inserting paragraph (1) . 122. Study on natural infrastructure at Corps of Engineers projects (a) Definition of natural feature and nature-based feature In this section, the terms natural feature and nature-based feature have the meanings given those terms in section 1184(a) of the Water Resources Development Act of 2016 ( 33 U.S.C. 2289a(a) ). (b) Study Not later than 2 years after the date of enactment of this Act, the Comptroller General of the United States shall conduct, and submit to the Committee on Transportation and Infrastructure of the House of Representatives and the Committee on Environment and Public Works of the Senate, a report on the results of a study on the consideration by the Secretary of natural infrastructure, natural features, and nature-based features in the study of the feasibility of projects for flood risk management, hurricane and storm damage risk reduction, and ecosystem restoration. (c) Requirements The study under subsection (b) shall include— (1) a description of guidance or instructions issued, and other measures taken, by the Secretary to consider natural infrastructure, natural features, and nature-based features in project feasibility studies; (2) an assessment, based on information from relevant Federal and non-Federal sources, of— (A) the costs, benefits, and effects associated with natural infrastructure, natural features, and nature-based features recommended by the Secretary for flood risk management, hurricane and storm damage risk reduction, and ecosystem restoration; and (B) the effectiveness of natural infrastructure, natural features, and nature-based features; (3) an analysis of projects for flood risk management, hurricane and storm damage risk reduction, and ecosystem restoration that have incorporated natural infrastructure, natural features, or nature-based features to identify best practices, including for measuring project benefits and costs