obligated or expended to implement any activity that reduces air base resiliency or demolishes protected aircraft shelters in the European theater without creating a similar protection from attack in the European theater until such time as the Secretary of Defense certifies to the congressional defense committees that protected aircraft shelters are not required in the European theater. 2803. Prohibition on use of funds to close or return to the host nation any existing air base No funds authorized to be appropriated by this Act or otherwise made available for the Department of Defense for fiscal year 2020 may be obligated or expended to implement any activity that closes or returns to the host nation any existing air base until such time as the Secretary of Defense certifies that there is no longer a need for a rotational military presence in the European theater. 2804. Increased authority for certain unspecified minor military construction projects (a) In general Notwithstanding the limitations specified in section 2805 of title 10, United States Code, the Secretary concerned may carry out unspecified minor military construction projects in an amount not to exceed $12,000,000 at the following installations: (1) Tyndall Air Force Base, Florida. (2) Camp Ashland, Nebraska. (3) Offutt Air Force Base, Nebraska. (4) Camp Lejeune, North Carolina. (5) Marine Corps Air Station Cherry Point, North Carolina. (b) Adjustment of limitation The Secretary concerned may adjust the dollar limitation specified in subsection (a) applicable to a project described in such subsection to reflect the area construction cost index for military construction projects published by the Department of Defense during the prior fiscal year for the location of the project, except that no such limitation may exceed $19,000,000 as the result of any adjustment made under this subsection. (c) Termination The authority under this section shall terminate on the date that is five years after the date of the enactment of this Act. 2805. Technical