In holding a hearing under this subtitle the Commissioner sits in a quasi-judicial capacity. Within 30 days after a hearing or any rehearing or reargument of matters involved in the hearing, the Commissioner shall issue an order that covers matters involved in the hearing and in any rehearing or reargument. The Commissioner shall serve a copy of the order on the same persons that were served notice of the hearing. The order shall contain: a concise statement of the facts found by the Commissioner; the Commissioner’s conclusions from the facts; and the information required by § 2-204(b) of this subtitle. The order may: affirm, modify, or nullify an action already taken; or constitute the taking of new action within the scope of the notice of the hearing.