Service and filing

All pleadings, notices, written motions, requests, petitions, and briefs relating to a proceeding must be served on all parties and filed with the agency. When a proceeding has been assigned to a hearing officer outside the agency, the agency shall inform the parties of the designated hearing officer's name and address, and filing must be with the designated hearing officer at the address of the hearing officer. Unless otherwise provided by law, filing is complete upon actual receipt by the agency or the hearing officer, if one outside the agency has been designated, or upon mailing, unless the agency or hearing officer requires actual receipt by a time certain. The date of service is the day when the document is deposited in the United States mail or is delivered in person, the day of facsimile or e-mail transmission, or the date of publication if service by publication is allowed or required, except that the date of service of a document served by certified mail is the date of its delivery, or of its attempted delivery, if refused. When a party has appeared by an attorney or an authorized representative, service must be upon the attorney or the duly authorized representative, unless service upon the party is ordered by the hearing officer. The serving party must be prepared to furnish satisfactory proof of service.