[Code of Federal Regulations] [Title 23, Volume 1] [Revised as of April 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 23CFR636.409] [Page 196] TITLE 23--HIGHWAYS CHAPTER I--FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PART 636_DESIGN-BUILD CONTRACTING--Table of Contents Subpart D_Exchanges Sec. 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.