Nothing in this part or the amendments made by this part shall be construed—
((1)) to supersede the limitations or exceptions on the use of rocket engines for national security purposes under section 1608 of the Carl Levin and Howard P. “Buck” McKeon National Defense Authorization Act for Fiscal Year 2015 (; ; note), as amended by section 1607 of the National Defense Authorization Act for Fiscal Year 2016 (; ) and section 1602 of the National Defense Authorization Act for Fiscal Year 2017 (; ); or
((2)) to prohibit a contractor or subcontractor of the Department of Defense from acquiring components referred to in such section 1608.