33 U.S.C. § 701b: Flood protection projects

floodproofing of structures, including through elevation; floodplain regulation; acquisition of floodplain land for recreational, fish and wildlife, and other public purposes; relocation; and the use of a feature described in section 2289a(a) of this title . Where a nonstructural alternative is recommended, non-Federal participation shall be comparable to the value of lands, easements, and rights-of-way which would have been required of non-Federal interests under section 701c of this title , for structural protection measures, but in no event shall exceed 20 per centum of the project costs. The Secretary shall conduct a review of policies, procedures, and techniques relating to the evaluation and development of flood control measures with a view toward identifying impediments that may exist to justifying nonstructural flood control measures as alternatives to structural measures. Not later than 1 year after the date of the enactment of this Act [ Oct. 12, 1996 ], the Secretary shall transmit to Congress a report on the findings of the review conducted under this subsection, together with any recommendations for modifying existing law to remove any impediments identified under such review.”