Cal. WAT § 9551

Any parcel of land bid in and purchased by the drainage district at the delinquent sale shall be held in trust for the bond fund of the assessment upon which the land was sold and may be sold and conveyed by the board at any time after the expiration of the redemption period of one year at public or private sale, with or without notice to any person paying not less than the amount for which the parcel was bid in by the county treasurer at the delinquent sale, with interest thereon at the rate of 12 per cent per annum compounded yearly from the date of the delinquent sale, and also the amount of all subsequent installments then delinquent, with accrued interest and penalties thereon.