FAR and DFARS › FAR Part 15: Contracting by Negotiation › Subpart 15.2
FAR 15.206 Amending the solicitation.
The codified text (eCFR, as of 2026-10-02). Under the Revolutionary FAR Overhaul ↗, agencies follow class deviations with new text for many parts while the formal rules go through the Federal Register: check the solicitation and your contract's clauses, which rule.
In plain English
This section tells the contracting officer to amend a solicitation whenever the Government changes its requirements or terms and conditions, whether before or after proposals are received. It also explains who must receive amendments, when a solicitation must be cancelled and reissued instead, and what information each amendment should contain. For contractors, it means changes to a solicitation should come through a formal amendment, and very substantial post-offer changes may lead to cancellation and a new solicitation.
Applies to: Contracting officers amending solicitations, and offerors receiving them
What it requires
- Amend the solicitation when the Government changes its requirements or terms and conditions
- Issue pre-proposal amendments to all parties receiving the solicitation
- Issue post-proposal amendments to all offerors not eliminated from the competition
- Cancel the original solicitation and issue a new one if a post-offer amendment is so substantial it exceeds what prospective offerors reasonably could have anticipated
Key terms: solicitation · amendment · offerors · receipt of proposals · cancellation
Written by AI from this section's text. A guide, not legal advice: the text below rules.
The text
(a) When, either before or after receipt of proposals, the Government changes its requirements or terms and conditions, the contracting officer shall amend the solicitation.
(b) Amendments issued before the established time and date for receipt of proposals shall be issued to all parties receiving the solicitation.
(c) Amendments issued after the established time and date for receipt of proposals shall be issued to all offerors that have not been eliminated from the competition.
(d) If a proposal of interest to the Government involves a departure from the stated requirements, the contracting officer shall amend the solicitation, provided this can be done without revealing to the other offerors the alternate solution proposed or any other information that is entitled to protection (see 15.207(b) and 15.306(e)).
(e) If, in the judgment of the contracting officer, based on market research or otherwise, an amendment proposed for issuance after offers have been received is so substantial as to exceed what prospective offerors reasonably could have anticipated, so that additional sources likely would have submitted offers had the substance of the amendment been known to them, the contracting officer shall cancel the original solicitation and issue a new one, regardless of the stage of the acquisition.
(f) Oral notices may be used when time is of the essence. The contracting officer shall document the contract file and formalize the notice with an amendment (see subpart 4.5, Electronic Commerce in Contracting).
(g) At a minimum, the following information should be included in each amendment:
(1) Name and address of issuing activity.
(2) Solicitation number and date.
(3) Amendment number and date.
(4) Number of pages.
(5) Description of the change being made.
(6) Government point of contact and phone number (and electronic or facsimile address, if appropriate).
(7) Revision to solicitation closing date, if applicable.
Sections it refers to
← 15.205 Issuing solicitations. · 15.207 Handling proposals and information. →
Rule changes for FAR Part 15
- Federal Acquisition Regulation: Revolutionary FAR Overhaul Parts 8, 12, 13, 15, 38, 44, and 51 ↗ · proposed 2026-09-18 · comments due 2026-10-19
- Federal Acquisition Regulation: Inflation Adjustment of Acquisition-Related Thresholds ↗ · final rule 2025-08-27 · effective 2025-10-01
- Federal Acquisition Regulation: Preventing Organizational Conflicts of Interest in Federal Acquisition ↗ · proposed 2025-01-15 · comments due 2025-03-17
- Federal Acquisition Regulation: Controlled Unclassified Information ↗ · proposed 2025-01-15 · comments due 2025-03-17
- Federal Acquisition Regulation: Inflation Adjustment of Acquisition-Related Thresholds ↗ · proposed 2024-11-29 · comments due 2025-01-28
- Federal Acquisition Regulation: Reverse Auction Guidance ↗ · final rule 2024-07-30 · effective 2024-08-29
- Federal Acquisition Regulation: Sustainable Procurement ↗ · final rule 2024-04-22 · effective 2024-05-22
Source: eCFR, 48 CFR chapters 1 and 2 (GPO GovInfo bulk data) ↗. Plain words for the terms: glossary.