(4) Classification hearings will be held in conformity with 1 Pa. Code Part II (relating to general rules of administrative practice and procedure) as supplemented by Chapter 491 (relating to administrative practice and procedure). As set forth in § 491.4 (relating to institution of proceedings), requests for classification hearings, and all other papers relating to the case, shall be filed with the Administrative Docket Clerk at the following address: Commonwealth of Pennsylvania, Department of Transportation, Administrative Docket Clerk, Commonwealth Keystone Building, 400 North Street, 9th Floor, Harrisburg, Pennsylvania 17120-0096.