Except for the filing of the record and letters of limited appearance governed separately by this Part, all other papers required or permitted to be filed by the act and this Part shall be filed after service with the docket clerk of the Freshwater Wetlands Appeals Board at the board's office in the Department of Environmental Conservation. An original and five copies shall be filed of each such paper. Papers may be filed in person or by mail, and if by mail shall be deemed filed as of the day actually mailed. Copies of all such papers shall be served personally or by mail on all other parties to an appeal, and an affidavit of proof of service submitted with the original and five copies to be filed. Except for papers in or supplementing the record, all papers filed shall be eight and a half by eleven inches in size. The record shall be transmitted to the docket clerk without the necessity of service of copies or an affidavit of service. Copies of letters of limited appearance shall be sent to each party by mail by the writer of such letters, without the necessity of filing an affidavit of service.