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139 STAT. 278 PUBLIC LAW 119–21—JULY 4, 2025 under section 45Z is allowable (as determined without regard to subsection (a)(1)(A) of such section).’’. (B) EFFECTIVE DATE.—The amendment made by this paragraph shall apply to— (i) fuel sold or used on or after the date of the enactment of this Act, and (ii) fuel sold or used before the date of enactment of this Act, but only to the extent that claims for the credit under section 6426(k) of the Internal Rev- enue Code of 1986 with respect to such sale or use have not been paid or allowed as of such date. (2) ELIMINATION OF SPECIAL RATE.— (A) IN GENERAL.—Paragraph (3) of section 45Z(a) is amended to read as follows: ‘‘(3) DEFINITION OF SUSTAINABLE AVIATION FUEL.—For pur- poses of this section, the term ‘sustainable aviation fuel’ means liquid fuel, the portion of which is not kerosene, which is sold for use in an aircraft and which— ‘‘(A) meets the requirements of— ‘‘(i) ASTM International Standard D7566, or ‘‘(ii) the Fischer Tropsch provisions of ASTM Inter- national Standard D1655, Annex A1, and ‘‘(B) is not derived from palm fatty acid distillates or petroleum.’’. (B) CONFORMING AMENDMENT.—Section 45Z(c)(1) is amended by striking ‘‘, the $1.00 amount in subsection (a)(2)(B), the 35 cent amount in subsection (a)(3)(A)(i), and the $1.75 amount in subsection (a)(3)(A)(ii)’’ and inserting ‘‘and the $1.00 amount in subsection (a)(2)(B)’’. (C) EFFECTIVE DATE.—The amendments made by this paragraph shall apply to fuel produced after December 31, 2025. (h) SUSTAINABLE AVIATION FUEL CREDIT.—Section 6426(k), as amended by the preceding provisions of this Act, is amended by adding at the end the following new paragraph: ‘‘(5) TERMINATION.—This subsection shall not apply to any sale or use for any period after September 30, 2025.’’. (i) REGISTRATION OF PRODUCERS OF FUEL ELIGIBLE FOR CLEAN FUEL PRODUCTION CREDIT.— (1) IN GENERAL.—Section 13704(b)(5) of Public Law 117- 169 is amended by striking ‘‘after ‘section 6426(k)(3)),’ ’’ and inserting ‘‘after ‘section 40B),’ ’’. (2) EFFECTIVE DATE.—The amendment made by this sub- section shall apply to transportation fuel produced after December 31, 2024. (j) EXTENSION AND MODIFICATION OF SMALL AGRI-BIODIESEL PRODUCER CREDIT.— (1) IN GENERAL.—Section 40A is amended— (A) in subsection (b)(4)— (i) in subparagraph (A), by striking ‘‘10 cents’’ and inserting ‘‘20 cents’’, (ii) in subparagraph (B), by inserting ‘‘in a manner which complies with the requirements under section 45Z(f)(1)(A)(iii)’’ after ‘‘produced by an eligible small agri-biodiesel producer’’, and (iii) by adding at the end the following new subparagraph: 26 USC 4101 note. 26 USC 4101. 26 USC 45Z note. Applicability. 26 USC 6426 note.