; or (II) at the Secretary's discretion, any of fiscal years 2032 through 2036. (iii) Development of methodology The Secretary shall promulgate final regulations that establish the methodology for determining State DSH allotments under clause (i) not later than January 1, 2021. (C) State allotment flexibility option (i) In general A State may elect to increase or reduce the amount of the DSH allotment for the State and a fiscal year (as otherwise determined under this paragraph) for the purpose of providing certainty or more consistent DSH funding in subsequent fiscal years in accordance with this subparagraph. (ii) State option to reserve allotment amounts For any fiscal year after fiscal year 2021, a State may request that the DSH allotment for the State and fiscal year (as otherwise determined under this paragraph) be reduced by an amount that shall not exceed 10 percent of the amount of the allotment as so determined. (iii) State option to increase DSH allotment from allotment reserve For any fiscal year after fiscal year 2022, a State may request that the DSH allotment for the State and fiscal year (as otherwise determined under this paragraph) be increased by an amount that shall not exceed the DSH reserve amount for the State and fiscal year. (iv) DSH reserve amount (I) In general Subject to subclause (II), the DSH reserve amount for a State and fiscal year shall be equal to the sum of the amounts, if any, of any reductions to the State's DSH allotment (as otherwise determined under this paragraph) made in each of the preceding 5 fiscal years pursuant to a request under clause (ii). (II) Subtraction of increases from DSH reserve amount The amount of any increase to a State's DSH allotment for a fiscal year made pursuant to a request under clause (iii) shall be subtracted from the State's DSH reserve amount for such year and shall not be available to the State in subsequent fiscal years. (III) Rule of application In the case of an increase to a State's DSH allotment for a fiscal year that is less than the