; (ii) scandium; or (iii) any lanthanide series element. (b) Authority To dispose of and acquire materials for the National Defense Stockpile (1) Disposal authority Pursuant to section 5(b) of the Strategic and Critical Materials Stock Piling Act ( 50 U.S.C. 98d(b) ), the National Defense Stockpile Manager shall dispose of 3,000,000 pounds of tungsten ores and concentrates contained in the National Defense Stockpile (in addition to any amount previously authorized for disposal). (2) Acquisition authority (A) Authority Using funds available in the National Defense Stockpile Transaction Fund, the National Defense Stockpile Manager may acquire the following materials determined to be strategic and critical materials required to meet the defense, industrial, and essential civilian needs of the United States: (i) Aerospace-grade rayon. (ii) Electrolytic manganese metal. (iii) Pitch-based carbon fiber. (iv) Rare earth cerium compounds. (v) Rare earth lanthanum compounds. (B) Amount of authority The National Defense Stockpile Manager may use up to $37,420,000 in the National Defense Stockpile Transaction Fund for acquisition of the materials specified in subsection (b). (C) Fiscal year limitation The authority under subsection (b) is available for purchases during fiscal year 2020 through fiscal year 2024. (c) National Defense Stockpile sales (1) Sense of Congress It is the sense of Congress that tantalum should be designated as a strategic and critical material under the Strategic and Critical Materials Stock Piling Act ( 50 U.S.C. 98 et seq.) required to meet the defense, industrial, and essential civilian needs of the United States. (2) National Defense Stockpile sales of tantalum Section 2533c(d)(1) of title 10, United States code, is amended— (A) in subparagraph (C), by striking and at the end; (B) in subparagraph (D), by striking the period at the end and inserting ; and