; and (2) as a result of such consolidation, closure, and realignment, to realize efficiencies and savings that can be reinvested into critical military readiness and modernization initiatives. 3. Force structure plan, infrastructure inventory, and certification of need for consolidation, closure, and realignment of military installations (a) Force structure (1) Plan required The Secretary of Defense shall develop a force structure plan for the Armed Forces, to be based on an assessment by the Secretary of the probable threats to the national security of the United States during the period beginning with fiscal year 2018 and ending with fiscal year 2038. (2) Required elements The force structure plan shall include, at a minimum, the following elements: (A) The probable end-strength levels of the Armed Forces and major military force units, including land force divisions, carrier and other major combatant vessels, air wings, and other comparable units, identified by the Secretary as needed to meet the probable threats to the national security of the United States identified under paragraph (1). (B) The anticipated levels of funding that will be available for national defense purposes during the period specified in paragraph (1). (b) Infrastructure (1) Inventory required The Secretary shall conduct a comprehensive inventory of military installations worldwide for each military department, to include the specific number and type of facilities in the regular and reserve components. (2) Required elements As part of the infrastructure inventory and using the force structure plan, the Secretary shall address the following: (A) The number and type of infrastructure required to support— (i) the force structure plan