FAR 4.001 Definitions
Section Federal Acquisition Regulation
Facts
- Citation
- FAR 4.001
- Type
- Section
- Last amended
- 76 FR 39234 Effective Aug 4, 2011
- Proposed changes
- 1
- Text as of
- FAC 2026-01
- Official text
- acquisition.gov
Text from acquisition.gov. Federal Register history from the Federal Register's records of the rules that amended this section.
Text
As used in this part-
Procurement Instrument Identifier (PIID) means the Government-unique identifier for each solicitation, contract, agreement, or order. For example, an agency may use as its PIID for procurement actions, such as delivery and task orders or basic ordering agreements, the order or agreement number in conjunction with the contract number (see 4.1602).
Supplementary procurement instrument identifier means the non-unique identifier for a procurement action that is used in conjunction with the Government-unique identifier. For example, an agency may use as its PIID for an amended solicitation, the Government-unique identifier for a solicitation number (e.g., N0002309R0009) in conjunction with a non-unique amendment number (e.g., 0001). The non-unique amendment number represents the supplementary PIID.
Federal Register history
| Final rule | Published | Effective |
|---|---|---|
| Federal Acquisition Regulation; Unique Procurement Instrument Identifier |
Proposed changes
| Proposed rule | Published | Comments |
|---|---|---|
| Federal Acquisition Regulation: Revolutionary Federal Acquisition Regulation Overhaul Parts 1, 2, 4, 33, 39, 40, and 53 | Closed Jul 23, 2026No final rule found |
Sections cited
- FAR 4.1602 Identifying the PIID and supplementary PIID
Terms defined
- Procurement Instrument Identifier (PIID)
- Supplementary procurement instrument identifier
Quick answers
What is FAR 4.001?
FAR 4.001 is a section of the Federal Acquisition Regulation, titled "Definitions".
When was FAR 4.001 last changed?
The most recent final rule on record is "Federal Acquisition Regulation; Unique Procurement Instrument Identifier" (76 FR 39234), published Jul 5, 2011 and effective Aug 4, 2011.
Are changes to FAR 4.001 proposed?
One proposed change has no final rule yet.
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