(a) The county official who makes purchases for the county shall open the bids on the date specified in the notice. The date specified in the notice may be extended if the commissioners court determines that the extension is in the best interest of the county. All bids, including those received before an extension is made, must be opened at the same time. The commissioners court may adopt an order that delegates the authority to make extensions under this subsection to the county official who makes purchases for the county.
(b) Opened bids shall be kept on file and available for inspection by anyone desiring to see them until the first anniversary of the date of opening. Opened bids are subject to disclosure under Chapter 552, Government Code.