; and (iv) that the fabric was suitable for use in the manufacturing of men’s and boys’ cotton shirts. (B) Date of purchase For purposes of the affidavit under subparagraph (A), the date of purchase shall be the invoice date, and the dollar value shall be determined excluding duty, shipping, and related costs. (3) Filing date for affidavits Any person required to provide an affidavit under this section shall file the affidavit with the Secretary or as directed by the Secretary for any of calendar years 2019 through 2023, not later than March 15 of that calendar year. (4) Increase in payments to wool manufacturers in case of expiration of duty suspensions (A) In general In any calendar year in which the suspension of duty on wool products described in subparagraphs (B) and (C) is not in effect, the amount of any payment described in subsection (b)(2) to a manufacturer or successor-in-interest shall be increased by an amount the Secretary, after consultation with the Secretary of Commerce, determines is equal to the amount the manufacturer or successor-in-interest would have saved during the calendar year of the payment if the suspension of duty on such wool products were in effect. (B) Special rule for certain fabrics of worsted wool (i) In general With respect to fabrics of worsted wool described in clause (ii), subparagraph (A) shall be applied by substituting rate of duty on such wool products was 10 percent for suspension of duty on such wool products were in effect . (ii) Fabrics of worsted wool described Fabrics of worsted wool described in this paragraph are fabrics of worsted wool— (I) with average fiber diameters greater than 18.5 micron