Contractual terms and conditions will be defined up front with reverse auctioning opportunities. If there is needed negotiation on a particular term and condition, such negotiation will include all potential suppliers and will be finalized before the reverse auctioning opportunity solicitation is finalized. Suppliers must agree to the reverse auction solicitation's finalized terms and conditions before they will be eligible to participate in the reverse auction. Clarifications, negotiations, and acceptance of all specifications, requirements, terms and conditions, etc., will occur before the agency invites a supplier to participate in a reverse auction event. No changes to the specifications or terms and conditions will be allowed after bidding if the changes in a submitted bid would have rendered the bid unresponsive.