MILITARY CONSTRUCTION Sec. 2201. Authorized Navy construction and land acquisition projects. Sec. 2202. Family housing. Sec. 2203. Improvements to military family housing units. Sec. 2204. Authorization of appropriations, Navy. Title XXIII—Air Force Military Construction Sec. 2301. Authorized Air Force construction and land acquisition projects. Sec. 2302. Family housing. Sec. 2303. Improvements to military family housing units. Sec. 2304. Authorization of appropriations, Air Force. Sec. 2305. Modification of authority to carry out certain phased project authorized in fiscal years 2015, 2016, and 2017. Sec. 2306. Modification of authority to carry out certain fiscal year 2017 project. Sec. 2307. Modification of authority to carry out certain fiscal year 2018 project. Sec. 2308. Additional authority to carry out certain fiscal year 2019 projects. Title XXIV—Defense Agencies Military Construction Sec. 2401. Authorized defense agencies construction and land acquisition projects. Sec. 2402. Authorized energy conservation projects. Sec. 2403. Authorization of appropriations, defense agencies. Sec. 2404. Extension of authorizations of certain fiscal year 2015 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. Title XXVI—Guard and Reserve Forces Facilities Subtitle A—Project Authorizations and Authorization of Appropriations 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