Cal. Pub. Util. Code § 131286

If, after rejecting bids received under Section 131285, the county transportation authority determines and declares by a two-thirds vote of all of its voting members that, in its opinion, the supplies, equipment, or materials may be purchased at a lower price in the open market, the authority may proceed to purchase these supplies, equipment, or materials in the open market without further observance of the provisions regarding contracts, bids, or advertisement.