; (ii) as determined by the Secretary, the beginning farmer of covered commodities has, or has an option to obtain, a significant ownership share of the farm or a business producing commodities on the farm; (iii) the beginning farmer of covered commodities has not planted or been prevented from planting a covered commodity on the farm for any crop year before the 2007 crop year; and (iv) the average number of acres planted on the farm to covered commodities during the 2013 through 2017 crop years is greater than the number of base acres on the farm. (C) Base increase for beginning farmers of covered commodities (i) In general Subject to clause (ii), the number of base acres added to a farm under subparagraph (B) shall be equal to the difference between— (I) the 5-year average of— (aa) the acreage planted on the farm to all covered commodities for harvest, grazing, haying, silage, or other similar purposes for the 2013 through 2017 crop years, according to records submitted to the Farm Service Agency; and (bb) any acreage on the farm that the beginning farmer of covered commodities was prevented from planting during the 2013 through 2017 crop years to a covered commodity because of drought, flood, or other natural disaster, or other condition beyond the control of the beginning farmer of covered commodities, according to records submitted to the Farm Service Agency and as determined by the Secretary; and (II) the number of base acres for covered commodities on the farm. (ii) Limitation The Secretary shall adjust the number of base acres added to a farm under clause (i) to prevent the cumulative increase in the number of base acres under this paragraph from exceeding 5,000,000 base acres for all beginning farmers of covered commodities. (iii) Distribution Base acres added to a farm under clause (i) shall be added to the base acreage of each covered commodity on the farm in the proportion that— (I) the acreage planted to the covered commodity on the farm