for obligation except in compliance with the procedures set forth in that section. Of the amounts made available in this Act under the heading Science, Technology, Engineering, and Mathematics Engagement ( STEM Engagement ), up to $5,000,000 shall be available to jointly fund, with an additional amount of up to $1,000,000 each from amounts made available in this Act under the headings Science , Aeronautics , Space Technology , Exploration , and Space Operations , projects and activities for engaging students in STEM and increasing STEM research capacities of universities, including Minority Serving Institutions. Not to exceed $32,600,000 made available for the current fiscal year in this Act within Safety, Security and Mission Services may be transferred to the Working Capital Fund of the National Aeronautics and Space Administration. Balances so transferred shall be available until expended only for activities described in section 30102(b)(3) of title 51, United States Code, as amended by this Act, and shall remain available until expended. Any transfer pursuant to this provision shall be treated as a reprogramming of funds under section 505 of this Act and shall not be available for obligation except in compliance with the procedures set forth in that section. For execution of the Commercial Crew Transportation Capability (CCtCap) contract, amounts that have expired but have not been cancelled in the Space Operations appropriations account shall remain available through fiscal year 2027 for the liquidation of valid obligations incurred during the period of fiscal year 2017 through fiscal year 2019. National science foundation RESEARCH AND RELATED ACTIVITIES For necessary expenses in carrying out the National Science Foundation Act of 1950 ( 42 U.S.C. 1861 et seq. ), and Public Law 86–209 ( 42 U.S.C. 1880 et seq. )