Contracts for the purchase of supplies, equipment, and materials in excess of fifty thousand dollars ($50,000) shall be awarded to the lowest responsible bidder after competitive bidding, except in an emergency declared by the vote of two-thirds of the membership of the board.
Source:
Section 125223, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=PUC§ionNum=125223..