PRE-OPENING MODIFICATION OR WITHDRAWAL OF BIDS. No bidder may withdraw a bid within 60 days after the actual date of the opening thereof. 1.You typically will not be allowed to withdraw your bid at this point due to an error in judgment without some penalty. Each Proposer further understands and agrees that if it should withdraw any part or all of its. Describe the project to be bid and invite the contractors to submit a bid proposal on the work.