; (10) the Deputy Under Secretary of Defense for Acquisition and Sustainment; . (6) In section 181(d)(1)— (A) by redesignating subparagraphs (D) through (G) as subparagraphs (E) through (H), respectively; (B) by striking subparagraph (C); and (C) by inserting after subparagraph (B) the following new subparagraphs: (C) The Under Secretary of Defense for Research and Engineering. (D) The Under Secretary of Defense for Acquisition and Sustainment. . (7) In section 393(b)(2)— (A) by redesignating subparagraphs (C) through (E) as subparagraphs (D) through (F), respectively; (B) by striking subparagraph (B); and (C) by inserting after subparagraph (A) the following new subparagraphs: (B) The Under Secretary of Defense for Research and Engineering. (C) The Under Secretary of Defense for Acquisition and Sustainment. . (8) (A) In section 1702— (i) by striking the heading and inserting the following: 1702. Under Secretary of Defense for Acquisition and Sustainment: authorities and responsibilities