Any county or city governing body may, by resolution, request the board to review the financial statements of an emergency communications district serving such county or city. If the board determines that such district is accumulating excess reserves or retained earnings, and if such emergency communications district is not able to justify such accumulation of revenues, the board may petition the chancery court in a jurisdiction in which such emergency communications district is operating, to require the adoption of a temporary rate structure recommended by the board, or other temporary rate structure sufficient to reduce such excess retained earnings; provided, that any such rate ordered by the chancery court must be adequate to cover all reasonable and necessary costs of operation, and shall not threaten the financial integrity of such emergency communications district or its quality and level of 911 service.