OAC Rule 11. Notice of Hearing. 

The OAC shall send a Notice of Hearing to the address on the application.  If a Notice of Entry of Appearance or a response to the application is filed, the OAC shall send a Notice of Hearing to the address on the notice or response.  If no Notice of Entry of Appearance or no response is filed, the OAC shall send a Notice of Hearing to the respondent's address given on the application.  The Notice of Hearing shall be mailed or delivered within 20 days of the date of the confirmation.