A contractor that treats a contracting officer's follow-up phone call as a chance to patch a weak proposal is betting on a misreading of the rules — and that bet can cost the company its shot at award before it ever reaches best-and-final offers. FAR 15.306 splits post-proposal exchanges into three distinct categories — clarifications, communications, and discussions — and only the last one lets an offeror actually change what it submitted. Contracting officers apply the rule during negotiated procurements under FAR Part 15, after proposals are in but before award, and the category the agency picks determines whether a contractor gets a second chance or gets cut.
The distinction sounds like paperwork until an offeror is sitting outside the competitive range wondering why nobody asked about the one number that would have fixed its bid. It usually comes down to which of the three doors the agency walked through — and FAR 15.306 defines each one narrowly enough that mixing them up is an easy way to lose a protest, or win one.
Clarifications Can't Rewrite a Proposal
The lowest-stakes exchange is a clarification, reserved for procurements where the government plans to award without holding discussions at all. FAR 15.306(a) permits contracting officers to use clarifications only to resolve "minor or clerical" errors or to clarify some aspect of a proposal — not to let an offeror strengthen its substance. If a proposal is missing a signature or has a typo in a labor category, a clarification can fix it. If a proposal is missing a required technical approach or underpriced a line item, a clarification cannot supply what wasn't there.
Communications sit one step up, and they come into play before the agency has settled on which offerors make the competitive range. FAR 15.306(b) allows communications to "enhance Government understanding of proposals," address past-performance information the offeror hasn't had a chance to respond to, or resolve minor clarifications — but the clause is explicit that communications "shall not be used to cure proposal deficiencies or material omissions." An agency official who nudges an offeror toward guessing at a fix through a communication, rather than a formal discussion, is exceeding what the clause permits, and that gap is a recurring basis for bid protests at the Government Accountability Office.
The Competitive Range Is Where Contractors Get Cut
Before discussions can happen, the contracting officer has to decide who is still in contention. FAR 15.306(c)(1) states: "The contracting officer shall establish a competitive range comprised of all of the most highly rated proposals" — every proposal the agency's evaluators rank at the top tier is supposed to make the cut, not just the single top scorer. The contracting officer can trim the range further "for purposes of efficiency" under FAR 15.306(c)(2), but only if the solicitation told offerors up front that this was on the table. An offeror that gets excluded from the competitive range is not merely delayed — FAR 15.307(a) states plainly that once a proposal is "eliminated or otherwise removed from the competitive range, no further revisions to that offeror's proposal shall be accepted or considered." There is no appeal built into the clause; the proposal is done.
Only offerors that survive into the competitive range get to discussions, and FAR 15.306(d) defines discussions as negotiations conducted "with the intent of allowing the offeror to revise its proposal." This is the one exchange where an offeror can actually fix a weakness. The clause also obligates the contracting officer to steer those conversations: FAR 15.306(d)(3) requires the contracting officer to "indicate to, or discuss with, each offeror still being considered for award, deficiencies, significant weaknesses, and adverse past performance information to which the offeror has not yet had an opportunity to respond." That obligation cuts both ways for contractors — it means the agency has to tell them what's wrong, but it also means an offeror who gets flagged on a weakness and fails to fix it in the resulting proposal revision has used up its opportunity.
Fair Play Rules Inside Discussions
Once discussions open, FAR 15.306(e) puts limits on what government personnel can do inside them: no favoring one offeror over another, and no revealing one offeror's technical solution to a competitor. Discussions end with a formal close-out described in FAR 15.307(b), which requires the contracting officer to give every offeror remaining in the competitive range "an opportunity to submit a final proposal revision," set to a single common cutoff date across all offerors, and to tell them in writing that this revision is final because the agency intends to award without further changes. That common deadline is a formality worth watching — if one offeror gets extra time or an extra round that others don't, that disparity is exactly the kind of unequal treatment FAR 15.306(e) prohibits and exactly what a losing offeror will look for when it drafts a protest.
What It Means for Contractors
The practical takeaway is to read every agency phone call, email, or written question against the FAR 15.306 taxonomy before responding. If the solicitation says award may happen without discussions, treat any contact as a clarification and assume it cannot be used to fix a substantive gap — because if the agency tries to let a contractor use it that way, it is exposing the whole award to a protest. If the agency is still sorting the competitive range, remember that a communication that surfaces a deficiency is not an invitation to rewrite the technical volume; wait for actual discussions before treating any exchange as a chance to revise pricing or approach. Once discussions open, track every deficiency and weakness the contracting officer raises under FAR 15.306(d)(3) — those are the items the final proposal revision needs to close out, because after the common cutoff date in FAR 15.307(b), the door shuts. And if a competitor gets what looks like an extra round of back-and-forth after the same cutoff, that is worth flagging as a possible violation of FAR 15.306(e)'s prohibition on favoring one offeror over another. Knowing which of the three doors an agency has opened — clarification, communication, or discussion — is often the difference between a proposal that gets fixed and one that gets eliminated with no path back in.
