If the commissioner determines that a qualified municipality entitled to receive tax proceeds under this article has ceased to be a qualified municipality, he shall thereafter distribute the percentage of the proceeds of the tax to which that qualified municipality was entitled to the county which is conterminous with the special district and to each other qualified municipality within the special district pro rata according to the percentages of the tax to which each other such political subdivision is otherwise entitled; and such distribution formula shall remain in effect until a new certificate is filed and becomes effective as provided in Code Section 48-8-89.