5 C.F.R. § 1315.1 – Application.

(a) Procurement contracts. This part applies to contracts for the procurement of goods or services awarded by:
1. (1) All Executive branch agencies except:
  1. (i) The Tennessee Valley Authority, which is subject to the Prompt Payment Act (31 U.S.C. chapter 39), but is not covered by this part; and
  2. (ii) Agencies specifically exempted under 5 U.S.C. 551(1); and
2. (2) The United States Postal Service. The Postmaster General is responsible for issuing implementing procurement regulations, solicitation provisions, and contract clauses for the United States Postal Service.
(b) Vendor payments. All Executive branch vendor payments and payments to those defined as contractors or vendors (see § 1315.2(hh)) are subject to the Prompt Payment Act with the following exceptions:
1. (1) Contract Financing Payments, as defined in § 1315.2(h); and
2. (2) Payments related to emergencies (as defined in the Disaster Relief Act of 1974, Public Law 93-288, as amended (42 U.S.C. 5121 et seq.)); military contingency operations (as defined in 10 U.S.C. 101 (a)(13)); and the release or threatened release of hazardous substances (as defined in 4 U.S.C. 9606, Section 106).
(c) Utility payments. All utility payments, including payments for telephone service, are subject to the Act except those under paragraph (b)(2) of this section. Where state, local or foreign authorities impose generally-applicable late payment rates for utility payments, those rates shall take precedence. In the absence of such rates, this part will apply.
(d) Commodity Credit Corporation payments. Payments made pursuant to Section 4(h) of the Act of June 29, 1948 (15 U.S.C. 714b(h)) (“CCC Charter Act”) relating to the procurement of property and services, and payments to which producers on a farm are entitled under the terms of an agreement entered into under the Agricultural Act of 1949 (7 U.S.C. 1421 et seq.) are subject to this part.