Article 6. Public Utility Districts of California Public Contract Code >> Division 2. >> Part 3. >> Chapter 1. >> Article 6.

The provisions of this article shall apply to contracts subject to the Public Utility District Act provided for in Division 7 (commencing with Section 15501) of the Public Utilities Code.
Every complete project for new construction or project for any alteration, maintenance, or repair, if the costs of materials, supplies and labor exceed fifteen thousand dollars ($15,000), shall be let to the lowest responsible bidder. The board shall adopt plans and specifications, strain sheets, and working details and shall advertise for bids for the project in accordance with the plans and specifications so adopted. Notice inviting bids for all projects shall be published in a newspaper in the district at least one week prior to the time specified for receiving bids.
All bids for construction work shall be presented under sealed cover and shall be accompanied by one of the following forms of bidder's security:
  (a) Cash.
  (b) A cashier's check made payable to the district.
  (c) A certified check made payable to the district.
  (d) A bidder's bond executed by an admitted surety insurer, made payable to the district. Upon an award to the lowest bidder, the security of an unsuccessful bidder shall be returned in a reasonable period of time, but in no event shall that security be held by the district beyond 60 days from the time the award is made.