In the case of oilseeds designated before December 20, 2018, the Secretary shall determine the average yield per planted acre for the designated oilseed on a farm for the 1998 through 2001 crop years, excluding any crop year in which the acreage planted to the designated oilseed was zero.

If the yield per planted acre for a crop of an oilseed designated before December 20, 2018, for a farm for any of the 1998 through 2001 crop years was less than 75 percent of the county yield for that designated oilseed, the Secretary shall assign a yield for that crop year equal to 75 percent of the county yield for the purpose of determining the average under paragraph (1).

In the case of oilseeds designated on or after December 20, 2018, the payment yield shall be equal to 90 percent of the average of the yield per planted acre for the most recent 5 crop years, as determined by the Secretary, excluding any crop year in which the acreage planted to the covered commodity was zero.

In the case of a covered commodity on a farm for which base acres have been established or that is planted on generic base acres, if no payment yield is otherwise established for the covered commodity on the farm, the Secretary shall establish an appropriate payment yield for the covered commodity on the farm under paragraph (2).

To establish an appropriate payment yield for a covered commodity on a farm as required by paragraph (1), the Secretary shall take into consideration the farm program payment yields applicable to that covered commodity for similarly situated farms. The use of such data in an appeal, by the Secretary or by the producer, shall not be subject to any other provision of law.

At the sole discretion of the owner of a farm, the owner of a farm shall have a 1-time opportunity to update, on a covered-commodity-by-covered-commodity basis, the payment yield that would otherwise be used in calculating any price loss coverage payment for each covered commodity on the farm for which the election is made.

In no case shall the ratio obtained under paragraph (2)(C) be less than 90 percent or greater than 100 percent.

For the purposes of determining the average yield per planted acre under paragraph (2)(B), if the yield per planted acre for a crop of a covered commodity for a farm for any of the crop years described in that subparagraph was less than 75 percent of the average of county yields for those crop years for that commodity, the Secretary shall assign a yield for that crop year equal to 75 percent of the average of the 2013 through 2017 county yield for the covered commodity.

In the case of seed cotton, for purposes of determining the average of the yield per planted acre under this subsection, the average yield for seed cotton per planted acre shall be equal to 2.4 times the average yield for upland cotton per planted acre.

An election under this subsection shall be made at a time and manner so as to be in effect beginning with the 2020 crop year, as determined by the Secretary.

Subject to paragraph (2), the payment yield for seed cotton for a farm shall be equal to 2.4 times the payment yield for upland cotton for the farm established under section 8714(e)(3) of this title (as in effect on September 30, 2013).

At the sole discretion of the owner of a farm with a yield for upland cotton described in paragraph (1), the owner of the farm shall have a 1-time opportunity to update the payment yield for upland cotton for the farm, as provided in subsection (d), for the purpose of calculating the payment yield for seed cotton under paragraph (1).