to carry out certain fiscal year 2019 projects. Sec. 2406. Extension of authority to carry out certain fiscal year 2021 projects. Sec. 2407. Additional authority to carry out certain fiscal year 2022 projects. Sec. 2408. Additional authority to carry out certain fiscal year 2023 projects. TITLE XXV—International programs Subtitle A—North Atlantic Treaty Organization Security Investment Program Sec. 2501. Authorized NATO construction and land acquisition projects. Sec. 2502. Authorization of appropriations, NATO. Subtitle B—Host country in-kind contributions Sec. 2511. Republic of Korea funded construction projects. Sec. 2512. Republic of Poland funded construction projects. TITLE XXVI—Guard and Reserve Forces facilities Sec. 2601. Authorized Army National Guard construction and land acquisition projects. Sec. 2602. Authorized Army Reserve construction and land acquisition projects. Sec. 2603. Authorized Navy Reserve and Marine Corps Reserve construction and land acquisition projects. Sec. 2604. Authorized Air National Guard construction and land acquisition projects. Sec. 2605. Authorized Air Force Reserve construction and land acquisition projects. Sec. 2606. Authorization of appropriations, National Guard and Reserve. Sec. 2607. Extension of authority to carry out fiscal year 2018 project at Hulman Regional Airport, Indiana. Sec. 2608. Extension of authority to carry out fiscal year 2019 project at Francis S. Gabreski Airport, New York. Sec. 2609. Extension of authority to carry out certain fiscal year 2021 projects. Sec. 2610. Modification of authority to carry out fiscal year 2022 project at Nickell Memorial Armory, Kansas. Sec. 2611. Modification of authority to carry out fiscal year 2023 project at Camp Pendleton, California. Sec. 2612. Authority to conduct restoration and modernization projects at the First City Troop Readiness Center in Philadelphia, Pennsylvania. TITLE XXVII—Base realignment and closure activities Sec. 2701. Authorization of appropriations for base realignment and closure activities