; and (2) in paragraph (3)— (A) by striking (A) In general .—The President and inserting (A) Authority of President .—The President ; (B) by redesignating subparagraphs (B), (C), and (D) as subparagraphs (C), (D), and (E), respectively; (C) by inserting after subparagraph (A) (as so amended) the following: (B) Authority of Secretary of Defense (i) In general The Secretary of Defense may further adjust the total cost of a project subsequent to a waiver by the President of the limitation under paragraph (1)(A) if— (I) such total cost does not exceed the sum of— (aa) the cost estimate for the project as required by subparagraph (C)(ii)(I) that is included in the notification submitted by the President pursuant to such waiver; and (bb) the amount that is 50 percent of such cost estimate; and (II) the Secretary submits to the appropriate congressional committees a notification of the exercise of the adjustment. (ii) Scope The Secretary may modify the scope of a project subsequent to a waiver by the President of the limitation under paragraph (1)(A) if the Secretary submits to the appropriate congressional committees a notification of the exercise of the modification. ; (D) in subparagraph (C) (as so redesignated)— (i) in clause (i), by adding at the end the following: A project with respect to which the exercise of a further adjustment to the total cost of the project under subparagraph (B)(i) applies or with respect to which the exercise of a modification to the scope of the project under subparagraph (B)(ii) applies may only be carried out after the end of a 15-day period beginning on the date on which the appropriate congressional committees receive the notification required by subparagraph (B)(i) or (B)(ii), as the case may be. ; and (ii) in clause (ii), in the matter preceding subclause (I), by inserting , (B)(i), or (B)(ii) after (A)(ii) ; and (E) in subparagraph (E) (as so redesignated)— (i) by striking waiver authority and inserting waiver and other authorities