41 C.F.R. § 51-5.7 Payments.
Title 41 - Public Contracts and Property Management
Payments for products or services of persons who are blind or have other severe disabilities shall be made within 30 days after shipment or receipt of a proper invoice or voucher.
Title 41: Public Contracts and Property Management
PART 51–5—CONTRACTING REQUIREMENTS
§ 51-5.7 Payments.

