2005 California Streets and Highways Code Sections 9270-9271 Article 3. Payment of Entire Assessment

9270.  Any interested owner may release and pay any unpaid
reassessment by depositing with the treasurer of the city the total
unpaid balance of such reassessment, together with the total interest
which would become due on such reassessment were it paid in the
regular way.
9271.  If an owner pays a reassessment in a lump sum and the
proceeds of that payment are used for the purchase or call of a bond,
the person paying the reassessment shall be entitled to credit and
reimbursement of his proportion of the interest saved by such
purchase or call, less his proportion of any costs incurred for
publishing or serving any notice of purchase or call for redemption.