Wat. Code, § 46790

In any district having no outstanding bonds issued prior to September 15, 1935, any parcel of land heretofore deeded to the district by the county treasurer, as provided in this division, the title to which still remains in the district, and any parcel of land which is hereafter deeded to the district by the county treasurer may, without notice, be sold and conveyed by the board at private sale to the owner of record at the date of the treasurer’s deed to the district or to the owner’s successor in interest, upon his paying to the district the amount for which the same was struck off to the district with interest thereon at the rate of 7 percent per year from the date of the delinquent sale, together with any call that has been made upon any prior or subsequent assessment.