Cal. Pub. Util. Code § 125222

(a) The Legislature finds and declares that a compelling interest exists in ensuring all federal, state, local, and private moneys available to the district are captured and used in a timely manner.
(b) In order to maximize the use of federal, state, local, and private funds, and to maintain a competitive posture in seeking supplemental federal funds, the board may establish and use a flexible contracting process, consistent with this division, to maximize its efficient use of public funds.
(c) For the acquisition or lease of materials, supplies, or equipment, except in cases where an item of a specified brand or trade name is the only item that will properly meet the needs of the district or in an emergency declared by the vote of two-thirds of all the members of the board, all contracts shall be awarded as follows:
1. (1) A contract with an expected cost that equals or exceeds one hundred fifty thousand dollars ($150,000), as authorized by the board, shall be made or entered into with the lowest responsible bidder that meets the specifications. For purposes of determining the lowest bid, the amount of sales tax shall be excluded from the total amount of the bid.
2. (2) A contract with an expected cost that does not equal or exceed one hundred fifty thousand dollars ($150,000) shall be made or entered into using a district-approved competitive procurement process. When the expected cost of a contract equals or exceeds five thousand dollars ($5,000) and does not equal or exceed one hundred fifty thousand dollars ($150,000), the district shall seek a minimum of three quotations, either written or oral, to permit comparison of prices and other terms.
(d) For the acquisition of services that are not within a category of services described in Section 4525 of the Government Code, except in cases of an emergency declared by a vote of two-thirds of the membership of the board, all contracts shall be awarded as follows:
1. (1) A contract with an expected cost that equals or exceeds one hundred fifty thousand dollars ($150,000) shall be made and entered into by soliciting bids in writing and awarding the contract using a district-approved competitive procurement process, including, but not limited to, a negotiated procurement that may or may not evaluate price as a consideration.
2. (2) A contract with an expected cost that does not equal or exceed one hundred fifty thousand dollars ($150,000) shall be made or entered into using a district-approved competitive procurement process. When the expected cost of a service contract equals or exceeds five thousand dollars ($5,000) and does not equal or exceed one hundred fifty thousand dollars ($150,000), the district shall seek a minimum of three quotations, either written or oral, to permit comparison of prices and other terms.
(e) The board shall award contracts for architectural, landscape architectural, engineering, environmental, and land surveying services, and construction project management services, as those services are described in Section 4525 of the Government Code, in accordance with Chapter 10 (commencing with Section 4525) of Division 5 of Title 1 of the Government Code.
(f) Notwithstanding this chapter, the board may use any approved competitive procurement process authorized for state or local agencies under state or federal law, including, but not limited to, a competitive negotiation process in accordance with Article 7.5 (commencing with Section 20216) of Chapter 1 of Part 3 of Division 2 of the Public Contract Code. The board shall maintain acquisition and contracting guidelines and comply with those guidelines in the procurement of all goods and services.
(g) Provisions that are in a federally funded contract concerning disadvantaged business enterprises and that are in accordance with the request for proposals shall not be subject to negotiation with the successful bidder.