Cal. Gov. Code § 43784

The legislative body may sell any district bonds acquired from money in the general improvement fund to any property owner at such price as it determines, to enable him to use the bonds upon redemption of any property subject to assessment for the payment of such bonds. Such sale shall not be made unless the property owner simultaneously redeems the property and reinstates it upon the assessment rolls of the city free and clear of all unpaid liens and assessments, other than the lien for current city taxes not yet due and payable.