; 128 Stat. 3558), as most recently amended by section 1222 of the National Defense Authorization Act for Fiscal Year 2018 ( Public Law 115–91 ), is further amended by striking December 31, 2019 and inserting December 31, 2020 . (b) Funding Subsection (g) of such section 1236, as most recently so amended, is further amended— (1) by striking for the Department of Defense for Overseas Contingency Operations for fiscal year 2018 and inserting for the Department of Defense for Overseas Contingency Operations for fiscal year 2019 ; and (2) by striking $1,269,000,000 and inserting $850,000,000 . (c) Limitation of use of fiscal year 2019 funds Of the amounts authorized to be appropriated for fiscal year 2019 by this Act for activities under the authority in section 1236 of the Carl Levin and Howard P. Buck McKeon National Defense Authorization Act for Fiscal Year 2015, as amended by this section, not more than $450,000,000 may be obligated or expended for such activities until the date on which the Secretary of Defense has submitted to the congressional defense committees each of the following: (1) The report on the United States strategy in Iraq required by the joint explanatory statement of the committee of the conference accompanying Conference Report 115–404. (2) A report setting forth the following: (A) An explanation of the purpose of a continuing United States military presence in Iraq, including— (i) an explanation of the national security objectives of the United States with respect to Iraq; (ii) a detailed description of— (I) the size of a continuing United States military presence in Iraq; and (II) the roles and missions associated with a continuing United States military presence in Iraq; and (iii) a delineation of the responsibilities in connection with a continuing United States military presence in Iraq of— (I) the Combined Joint Task Force Operation Inherent Resolve (or a successor task force); (II) the Office of Security Cooperation in Iraq