Cal. Water Code § 55373

If the board determines the property, or interest in the property, to have a value of more than five thousand dollars ($5,000) or is being leased for more than one year, a notice of time and place of sale or leasing shall be given by posting three notices in three public places within the district five days before the date of sale or leasing. At the time fixed for the sale or leasing, bids shall be received and the board may sell or lease to the highest bidder or may reject any or all bids.