Revenue derived from special benefit assessments imposed pursuant to §
89-46 of this article, including penalties and interest, shall be credited to special funds to be known as the "Centerfield Subdivision Special Benefit Assessment Fund" and the "Timber Ridge Subdivision Special Benefit Assessment Fund." Monies in such funds shall be used to offset the costs of repairing, servicing and maintaining the drainage system of the subdivision for which purpose such fund was established, as the Village Board shall deem necessary. Any monies of the respective funds remaining unexpended at the end of the fiscal year shall remain in such fund and be applied toward the repair, service and maintenance of the drainage system of the subdivision for which purpose such fund was established for the succeeding year, as the Village Board shall deem necessary.