The auditor and treasurer of the county or counties in which the annexed area is located shall take such action as is appropriate to conform with the plan finally established pursuant to the terms of §§ 5-3-300 through 5-3-315, including releasing or adjusting any levy of district taxes within any annexed area. The annexing municipality and the district shall execute and deliver such documents, including any deeds or bills of sale, appropriate to the implementation of such a plan.