Public Utilities Code § 130237

Notwithstanding Section 130232, the commission may direct the purchase of any supply, equipment, or material without observance of any provision in this article regarding contracts, bids, advertisement, or notice upon a finding by two-thirds of all members of the commission that there is only a single source of procurement therefor and that the purchase is for the sole purpose of duplicating or replacing supply, equipment, or material already in use.