Notice of a hearing shall be mailed at least ten (10) days before the hearing by certified mail, with return receipt, to the person requesting the hearing. Notice shall also be provided to the owner of the land as shown on the last equalized County assessment roll and to the last registered and legal owner of record. If any of such notices are returned undelivered by the United States Post Office, the hearing shall be continued to a date not less than ten (10) days from the date of such return.