; (B) in paragraph (2) (as so designated)— (i) in the first sentence, by striking such conservation plans and inserting conservation plans described in paragraph (1) ; and (ii) by striking such district. In return and all that follows through interest. The portion and inserting the following: “that district. (3) Cost sharing (A) In general The Secretary may agree to share the costs of carrying out a work of improvement, or specific practices and measures described in such an agreement, if the Secretary determines that cost sharing is appropriate and in the public interest. ; (B) Portion of costs The portion ; and (iii) in subparagraph (B) (as so designated)— (I) by striking programs. The Secretary and inserting the following: “programs. (4) Termination; modifications The Secretary ; (C) in paragraph (4) (as so designated)— (i) in the first sentence, by striking hereunder, as he and inserting under this subsection, as the Secretary ; and (ii) by striking herein. Notwithstanding and inserting the following: “under this subsection. (5) Preservation or surrender of history Notwithstanding ; and (D) in paragraph (5) (as so designated)— (i) by striking he and inserting the Secretary ; (ii) by striking paragraph and inserting subsection ; (iii) by striking hereunder for (1) preservation and inserting the following: “under this paragraph for— (A) preservation ; and (iv) in subparagraph (A) (as so designated), by striking crop; or (2) surrender and inserting the following: “crop; or (B) surrender