in the Federal share for purposes of subparagraphs (A) and (B) of paragraph (3). 121. Emergency response to natural disasters (a) In general Section 5 of the Act of August 18, 1941 ( 33 U.S.C. 701n ) is amended— (1) in subsection (a), by adding at the end the following— (5) Feasibility study (A) Determination Not later than 180 days after receiving, from a non-Federal sponsor of a project to repair or rehabilitate a flood control work described in paragraph (1), a request to initiate a feasibility study to further modify the relevant flood control work to provide for an increased level of protection, the Secretary shall provide to the non-Federal sponsor a written decision on whether the Secretary has the authority under section 216 of the Flood Control Act of 1970 ( 33 U.S.C. 549a ) to undertake the requested feasibility study. (B) Recommendation If the Secretary determines under subparagraph (B) that the Secretary does not have the authority to undertake the requested feasibility study, the Secretary shall include the request for a feasibility study in the annual report submitted under section 7001 of the Water Resources Reform and Development Act of 2014.