(a) The Commissioner may hold hearings for any purpose within the scope of this title as he may deem necessary.

(b) He shall hold a hearing:

(1) If required by any provision of this title; or

(2) Upon written demand for a hearing made by any person aggrieved by any act, threatened act, or failure of the Commissioner to act if such failure is deemed an act under any provision of this title or by any report, promulgation, or order of the Commissioner, other than an order on a hearing of which such person was given actual notice or at which such person appeared as a party or order pursuant to the order on such hearing.

(c) Any demand for a hearing pursuant to this Code section shall specify in what respects such person is aggrieved and the grounds to be relied upon as a basis for the relief to be demanded at the hearing; and, unless postponed by mutual consent, the hearing shall be held within 30 days after receipt by the Commissioner of the demand for a hearing. Such hearing shall be held only if the Commissioner shall find that the demand for a hearing is made in good faith, that the applicant would be aggrieved, and that such grounds otherwise justify holding such hearing.

(d) Pending the hearing and decision on holding the hearing, the Commissioner may suspend or postpone the effective date of his previous action.