Any bid may be withdrawn at any time prior to the time fixed in the public notice for the opening of bids, but only by written request of the withdrawal of the bid filed with the director. The request shall be signed by the bidder or by an authorized representative. The withdrawal of a bid does not prejudice the right of a bidder to file a new bid prior to the date and time set for the opening of bids.

This section does not authorize the withdrawal of any bid after the time fixed in the public notice for the opening of bids.