; and (B) shall include unassigned crop base. (4) Allocation of acres (A) Allocation For the purpose of applying this subsection to covered commodities, the Secretary shall allocate the eligible acres under paragraph (3) among those covered commodities planted on the farm at any time during the 2019 through 2023 crop years. (B) Allocation formula The allocation of eligible acres to base acres for covered commodities shall be in proportion to the ratio of— (i) the 5-year average of— (I) the acreage planted on the farm to each covered commodity for harvest, grazing, haying, silage, or other similar purposes for the 2019 through 2023 crop years; and (II) any acreage on the farm that the producers were prevented from planting during the 2019 through 2023 crop years to that covered commodity because of drought, flood, or other natural disaster, or other condition beyond the control of the producers, as determined by the Secretary