From the Document: "The Department of Defense (DOD) and the Military Departments (MILDEPs) maintain distinctive organizational structures (Figure 1), policies, and programs for managing their installations. According to 16 U.S.C. §670(1)(A), a 'military installation' 'means any land, or interest in land owned by the United States and administered by the Secretary of Defense or the Secretary of a [MILDEP], except land under the jurisdiction of the Assistant Secretary of the Army having responsibility for civil works.' The term is further defined in 10 U.S.C. §2801(c)(4) to mean 'a base, camp, post, station, yard, center, or other activity.' In general, this includes facilities, training ranges, and other supporting infrastructure that reside on a military installation."
CRS In Focus, IF11263
Congressional Research Service: https://crsreports.congress.gov/