California Code, Public Utilities Code - PUC § 125225.1

Notwithstanding Section 125222, the board may direct the purchase of any supplies, equipment, or materials without complying with any contracting, bidding, or advertising requirements upon a finding by two-thirds of all members of the board that there is only a single source of procurement and that the purchase is for the sole purpose of duplicating, repairing, or replacing supplies, equipment, or materials that are in use, including upgrades or migrations of proprietary intellectual property.