Thanks all. After a little research (yes ? I should have done this first), here?s what I found:
1. Cibinic & Nash "Competitive Negotiations" GWU Reference Book, page 483, Oral Presentations Para 4. Exchanges with Government Team: "The present regulations make it clear that agency officials may ask questions and seek further detail. This is consistent with prior decisions, NAHB Research Found, Inc, Comp. Gen. Dec. B-219344, 85-2 CPD." Although I know the FAR describes the oral presentation process as an open dialogue amoungst the parties, I couldn?t find ?regulations that make it clear that agency officials may ask questions and seek further detail.?
2. Also called out in Para 4 above, Case Development Alternatives, Inc, File B-279920 Date Aug 6 1998: "..Offerors were told...they would be required to make an oral presentation followed by a brief, fact-finding interview process." ... "The interview process will be limited to questions concerning information requested in the BAFO... No discussions or an other form of negotiations will take place."
"...the record shows that the questions asked are in the nature of clarifications --- they merely request additional detail concerning information already presented..."
"For example,...(offeror) reduced by ten the number of Bosnian lending professionals that it would use under the contract. During the oral interview the firm was asked to describe any changes that this reduction would require in the way the lending staff was deployed and organized. Other questions included requests for elaboration on the reasons for selecting particular personnel and on arguments made and postions taken to support a particular approach...."