; relating to consultation and coordination with Indian Tribal governments); or (2) section 1501.2(d)(2) of title 40, Code of Federal Regulations. 8123. Funds appropriated for the Next Generation Aerial Refueling Aircraft (KC–46), Missile Segment Enhancement (MSE) Missile, and Trident missile programs by the Department of Defense Appropriations Act, 2014 (division C of Public Law 113–76 ) and the Department of Defense Appropriations Act, 2015 (division C of Public Law 113–235 ) are to remain available through fiscal year 2024 for the liquidation of valid obligations incurred for the programs specified in this section as of September 30, 2016. 8124. During fiscal year 2020, any advance billing for background investigation services and related services purchased from activities financed using Defense Working Capital Funds shall be excluded from the calculation of cumulative advance billings under section 2208(l)(3) of title 10, United States Code. 8125. None of the funds appropriated or otherwise made available by this Act may be obligated or expended by the Department of Defense for the Space Development Agency (SDA), and not more than 50 percent of the funds appropriated or otherwise made available by this Act may be obligated or expended by the Department of Defense for the Next Generation Overhead Persistent Infrared program (PE 1206442F) until a period of 90 days has elapsed following the date on which the Secretary of Defense, in consultation with the Secretary of the Air Force and the Under Secretary of Defense for Research and Engineering, submits to the congressional defense committees— (1) the proposed plan to establish the SDA, and a description of the programs and projects the SDA plans to carry out over the next three years, including associated funding requirements; (2) a description of how the Air Force and the SDA will coordinate and cooperate to develop an agreed-upon integrated space architecture that will guide both SDA and Air Force investments