; or (B) increase propellant performance in a weapon propulsion system as related to lethal effects, range, or speed. 244. Limitation on sourcing chemical materials for munitions from certain countries (a) Limitation The Secretary of Defense may not procure a chemical material for munitions specified in subsection (b) from any country specified in subsection (c). (b) Chemical materials specified The chemical materials for munitions specified in this subsection are the chemicals listed under the heading Task 1: Domestic Production of Critical Chemicals in section 3.0E of the document of the Department of Defense titled Statement of Objectives (SOO) for Critical Chemicals Production (FOA: FA8650-19-S-5010, Appendix VI, Call: 012) and dated December 5, 2022. (c) Countries specified The countries specified in this subsection are the following: (1) The People’s Republic of China. (2) The Russian Federation. (3) The Islamic Republic of Iran. (4) The Democratic People’s Republic of North Korea. (d) Effective date The requirements of this section shall take effect on a date determined by the Secretary of Defense that is not later than September 30, 2028. 245. Defense industrial base munition surge capacity critical reserve (a) In general The Under Secretary of Defense for Acquisition and Sustainment, in coordination with the service acquisition executive of each military department, may establish a reserve of long-lead items and components to accelerate the delivery of munitions described in section 222c(c) of title 10, United States Code. (b) Quantity The quantity of long-lead items and components reserved pursuant to subsection (a) should be in amounts commensurate to fulfill the requirements identified as Out-Year Unconstrained Total Munitions Requirement and Out-Year inventory numbers under section 222c(a) of title 10, United States Code. (c) Authority for advance procurement The Under Secretary of Defense for Acquisition and Sustainment may enter into one or more contracts, beginning in fiscal year 2024, for the