; (2) in paragraph (2)— (A) in the matter preceding subparagraph (A), by striking paragraph (1)(A) and inserting paragraph (1) ; and (B) in subparagraph (A), by striking and at the end and inserting or ; (3) in paragraph (3), by striking paragraph (1)(A) and inserting paragraph (1) ; and (4) in paragraph (4)(B), by striking classes IV and inserting classes III . (c) Review and guidance for practice costs and payment rates (1) In general Section 1244(j)(1) of the Food Security Act of 1985 ( 16 U.S.C. 3844(j)(1) ) is amended— (A) in the matter preceding subparagraph (A), by striking Not later than 1 year after the date of enactment of the Agriculture Improvement Act of 2018 , and not later than October 1 of each year thereafter, the Secretary shall and inserting The Secretary shall establish a process under which the Secretary shall annually ; (B) by amending subparagraph (A) to read as follows: (A) review, with respect to each State, the actual practice costs and rates of payments (or, where actual practice costs and rates of payments are not available, estimates of such practice costs and rates) made to producers pursuant to programs under this title for practices on eligible land; and ; and (C) in subparagraph (B)— (i) in clause (ii), by striking and at the end; (ii) by redesignating clause (iii) as clause (iv); (iii) by inserting after clause (ii) the following: (iii) accounts for the variability in costs of implementing practices on eligible land under this title; and ; and (iv) in clause (iv), as so redesignated, by striking regional, State, and and inserting State and . (2) Guidance; review Section 1244(j)(2) of the Food Security Act of 1985 ( 16 U.S.C. 3844(j)(2) ) is amended— (A) in subparagraph (A), by striking estimates for ; and (B) in subparagraph (B)— (i) in clause (i), by striking and at the end; (ii) by redesignating clause (ii) as clause (iii); (iii) by inserting after clause (i) the following: (ii) monitoring for and identifying significant variability in practice costs in each year; and