If notice of protest is filed, the commission shall fix a time for hearing the same and shall proceed as promptly as possible to hear and consider any matter relative and material thereto which may be presented in support of any such protest so filed. If, after hearing any such protest, the commission shall be of the opinion that its valuation should not be made final, it shall make such changes as may be necessary to do justice, and shall issue an order making such valuation as corrected final as of the date thereof, which order shall be a final order of the commission. If, after hearing any such protest, the commission shall be of the opinion that its valuation should be made final, it shall issue an order making such valuation final as of the date thereof, which order shall likewise be a final order of the commission. Any such final order and the commission’s report of valuation upon which the same is based shall be a permanent public record of the commission, and shall be kept on file at its office. If no protest is filed as provided in Section property – Notice; filing of protest; finality” class=”unlinked-ref” datatype=”S” sessionyear=”2020″ statecd=”AL” title=”37″>37-4-18 and such report of valuation by the commission becomes final as therein provided, then the valuation fixed in such report shall for all future rate-making purposes be the permanent basic valuation of the property of such utility unless there be a revaluation of the property of such utility as is provided in this article. If such protest is filed and after hearing thereof and order thereon, no appeal be taken to the Circuit Court of Montgomery County, then the valuation fixed by such final order thereon shall for all future rate-making purposes be the permanent basic valuation of the property of such utility unless there is a revaluation of the property of such utility as is provided in this article.