; and (2) by redesignating paragraphs (4) and (6) as paragraphs (2) and (3), respectively. 911. Limitation on maximum number of Deputy Assistant Secretaries of Defense The maximum number of Deputy Assistant Secretaries of Defense after the date of the enactment of this Act may not exceed 46. 912. Modification of definition of OSD personnel for purposes of limitation on number of Office of Secretary of Defense personnel (a) Modification (1) In general Section 143(b) of title 10, United States Code, as amended by section 903(a) of the National Defense Authorization Act for Fiscal Year 2017 ( Public Law 114–328 ), is further amended by striking and detailed personnel and inserting detailed, and contractor personnel . (2) Effective date The amendment made by paragraph (1) shall take effect on October 1, 2018. (b) Report on number of contractor personnel in OSD and each secretariate of the military departments Not later than December 31, 2017, the Secretary of Defense shall submit to the congressional defense committees a report specifying the following: (1) The number of contractor personnel in the Office of the Secretary of Defense as of October, 1, 2017. (2) The number of contractor personnel in each office of a Secretary of a military department as of October 1, 2017. B Organization of Other Department of Defense Offices and Elements 921. Reduction in authorized number of Assistant Secretaries of the military departments (a) Assistant Secretaries of the Army Section 3016(a) of title 10, United States Code, is amended by striking five and inserting four . (b) Assistant Secretaries of the Navy Section 5016(a) of such title is amended by striking four and inserting three . (c) Assistant Secretaries of the Air Force Section 8016(a) of such title is amended by striking four and inserting three . 922. Qualifications for appointment of Assistant Secretaries of the military departments for financial management (a) Assistant Secretary of the Army Section 3016(b)(4) of title 10, United States Code, is amended— (1) by