An application for rehearing does not modify the effective date of the decision and is appropriate only if the final decision is:
Within 30 days from the filing of the application for rehearing the commission shall set a hearing date on the application, or shall enter an order without a hearing, or shall grant or deny the application. If the applicant is granted a rehearing, the commission will schedule a rehearing as soon as practicable. If the commission does not enter an order within 30 days from the filing of the application for rehearing, the application shall be deemed to be denied.
Ala. Code § 34-27-37 (1975)