of appropriations in section 2403(a) and as specified in the funding table in section 4601. 2402. Authorized Energy Resilience and Conservation Investment Program projects (a) Inside the United States The Secretary of Defense may carry out energy conservation projects under chapter 173 of title 10, United States Code, for the installations or locations inside the United States using amounts appropriated pursuant to the authorization of appropriations in section 2403(a) and as specified in the funding table in section 4601. (b) Outside the United States The Secretary of Defense may carry out energy conservation projects under chapter 173 of title 10, United States Code, for the installations or locations outside the United States using amounts appropriated pursuant to the authorization of appropriations in section 2403(a) and as specified in the funding table in section 4601. 2403. Authorization of appropriations, Defense Agencies (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 Defense (other than the military departments), 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 of title 10, United States Code, and any other cost variation authorized by law, the total cost of all projects carried out under section 2401 of this Act may not exceed the total amount authorized to be appropriated under subsection (a), as specified in the funding table in section 4601. XXV International programs A North Atlantic Treaty Organization Security Investment Program 2501. Authorized NATO construction and land acquisition projects The Secretary of Defense may make contributions for the North Atlantic Treaty Organization Security Investment Program as provided in section 2806 of title 10, United States Code, in an amount not to