; or (2) the date of the enactment of this Act. XXI Army military construction 2101. Authorized Army construction and land acquisition projects (a) Inside the United States The Secretary of the Army may acquire real property and carry out military construction projects for the installations or locations inside the United States using amounts appropriated pursuant to the authorization of appropriations in section 2103(a) and as specified in the funding table in section 4601. (b) Outside the United States The Secretary of the Army may acquire real property and carry out military construction projects for the installations or locations outside the United States using amounts appropriated pursuant to the authorization of appropriations in section 2103(a) and as specified in the funding table in section 4601. 2102. Family housing (a) Construction and acquisition The Secretary of the Army may construct or acquire family housing units (including land acquisition and supporting facilities) at the installations or locations, in the number of units, using amounts appropriated pursuant to the authorization of appropriations in section 2103(a) and as specified in the funding table in section 4601. (b) Planning and design The Secretary of the Army may carry out architectural and engineering services and construction design activities with respect to the construction or improvement of family housing units using amounts not to exceed amounts appropriated pursuant to the authorization of appropriations in section 2103(a) and as specified in the funding table in section 4601. 2103. Authorization of appropriations, Army (a) Authorization of appropriations Funds are hereby authorized to be appropriated for fiscal years beginning after September 30, 2019, for military construction, land acquisition, and military family housing functions of the Department of the Army as specified in the funding table in section 4601. (b) Limitation on total cost of construction projects Notwithstanding the cost variations authorized by section 2853