; and (2) by inserting after subparagraph (A) the following new subparagraph (B): (B) The Assistant Secretary of the Air Force for Space Acquisition and Integration shall have a Principle Military Deputy for Space Acquisition and Integration, who shall be an officer of the Space Force on active duty. The Principal Military Deputy for Space Acquisition and Integration shall be appointed from among officers who have significant experience in the areas of acquisition and program management. The position of Principal Military Deputy for Space Acquisition and Integration shall be designated as a critical acquisition position under section 1731 of this title. In the event of a vacancy in the position of Assistant Secretary of the Air Force for Space Acquisition and Integration, the Principal Military Deputy for Space Acquisition and Integration may serve as Acting Assistant Secretary for Space Acquisition and Integration for a period of not more than one year. . 1605. Use of middle tier acquisition authority for Space Development Agency acquisition program (a) In general The Director of the Space Development Agency shall use the middle tier of acquisition authority, consistent with section 804 of the National Defense Authorization Act for Fiscal Year 2016 ( Public Law 114–92