California Code, Streets and Highways Code - SHC § 8885

Whenever the balance in the special reserve fund is sufficient to retire all remaining outstanding bonds in the issue, whether by advance retirement or otherwise, collection of the principal and interest on the assessments shall be discontinued and the special reserve fund shall be liquidated in retirement of the bonds.

In the event that the balance in the fund at the time of liquidation exceeds the amount required to retire all outstanding bonds in the issue, the excess shall be apportioned to each parcel upon which the individual assessment remained unpaid at the time the balance in the reserve fund was sufficient to retire all outstanding bonds in the issue.  The payments shall be made in cash to the respective owners of the parcels except that, if the excess is not greater than one thousand dollars ($1,000), the excess may be transferred to the general fund of the entity conducting the proceedings.