43 C.F.R. § 5451.1
(a) A minimum performance bond of not less than 20 percent of the total contract price shall be required for all contracts of $10,000 or more, but the amount of the bond shall not be in excess of $500,000, except when the purchaser opts to increase the minimum bond as provided in § 5451.2. A minimum performance bond of not less than $500 or 20% of the contract price, whichever is greater, will be required for all installment contracts less than $10,000. For cash sales less than $10,000, bond requirements, if any, will be at the discretion of the authorized officer. The performance bond may be:
[35 FR 9786, June 13, 1970, as amended at 38 FR 6281, Mar. 8, 1973; 46 FR 42673, Aug. 24, 1981; 47 FR 38696, Sept. 2, 1982; 85 FR 82375, Dec. 18, 2020]