---
kind: "section"
citation: "23 C.F.R. § 636.409"
title: "23"
number: "636.409"
heading: "Can offerors revise their proposals during communications?"
url: "https://uscodex.org/cfr/23/636.409"
---

# §636.409. Can offerors revise their proposals during communications?

- (a) No, communications shall not provide an opportunity for an offeror to revise its proposal, but may address the following:
  - (1) Ambiguities in the proposal or other concerns (e.g., perceived deficiencies, weaknesses, errors, omissions, or mistakes); and
  - (2) **Information relating to relevant past performance.**
- (b) Communications must address adverse past performance information to which the offeror has not previously had an opportunity to comment.

## Notes

### Authority

Authority: Sec. 1503 of Pub. L. 109-59, 119 Stat. 1144; Sec. 1307 of Pub. L. 105-178, 112 Stat. 107; 23 U.S.C. 101, 109, 112, 113, 114, 115, 119, 128, and 315; 49 CFR 1.48(b).

### Source

Source: 67 FR 75926, Dec. 10, 2002, unless otherwise noted.