; and (B) with respect to a prime contractor (as defined in section 8701 of title 41, United States Code) that subcontracts with a small business concern or nonprofit organization, the head of the Federal agency shall, to fullest extent permitted by law and to the maximum extent practicable, establish an accelerated payment date of 15 days after receipt of a proper invoice for the amount due if the prime contractor agrees to make payments to the subcontractor in accordance with the accelerated payment date, to the maximum extent practicable, without any further consideration from or fees charged to the subcontractor. (4) Bar on multiple forms of contract relief A small business concern or nonprofit organization may not receive a modification of terms or assistance under more than 1 paragraph of this subsection with respect to any single contract. (c) Resolicitation of contracts with small business concerns During fiscal years 2021 and 2022, a Federal agency shall not cancel a contract in which the prime contractor (as defined in section 8701 of title 41, United States Code) is a small business concern that defaulted on the terms of the contract directly or indirectly due to the COVID–19 unless the Director of Small and Disadvantaged Business Utilization of the Federal agency certifies that— (1) the contract is mission-critical; (2) resolicitation of the contract would allow a faster delivery than the small business concern could provide