; and (2) by striking paragraph (1) and inserting the following new paragraphs: (1) One of the Deputy Under Secretaries is the Deputy Under Secretary of Defense for Research and Engineering. (2) One of the Deputy Under Secretaries is the Deputy Under Secretary of Defense for Acquisition and Sustainment. . (d) Redesignation of DUSD for Personnel and Readiness as DUSD for Personnel and Health Paragraph (4) of subsection (c) of such section, as amended and redesignated by this section, is further amended by striking Personnel and Readiness and inserting Personnel and Health . (e) Conforming amendments (1) OSD Paragraph (6) of section 131(b) of title 10, United States Code, is amended to read as follows: (6) The Deputy Under Secretaries of Defense. . (2) Precedence Section 138(d) of such title is amended by striking Principal . (f) Executive schedule level IV (1) In general Section 5315 of title 5, United States Code, is amended— (A) by striking Principal in the items relating to the Principal Deputy Under Secretary of Defense for Policy, the Principal Deputy Under Secretary of Defense (Comptroller), and the Principal Deputy Under Secretary of Defense for Intelligence