Section 13-1-106 - Competitive sealed bids; correction or withdrawal of bidsA. A bid containing a mistake discovered before bid opening may be modified or withdrawn by a bidder prior to the time set for bid opening by delivering written or telegraphic notice to the location designated in the invitation for bids as the place where bids are to be received. After bid opening, no modifications in bid prices or other provisions of bids shall be permitted. A low bidder alleging a material mistake of fact which makes his bid nonresponsive may be permitted to withdraw its bid if: (1) the mistake is clearly evident on the face of the bid document; or (2) the bidder submits evidence which clearly and convincingly demonstrates that a mistake was made. B. Any decision by a procurement officer to permit or deny the withdrawal of a bid on the basis of a mistake contained therein shall be supported by a determination setting forth the grounds for the decision.