Freight and Passenger Tariff Regulations Governing the Publication, Posting, and Filing of Rates, Fares, and Charges by Common Carriers by Water in Interstate Commerce as Defined in Section 1 of the Shipping Act, 1916, as Amended, and Subject to the Jurisdiction of the United States Maritime Commission, Prescribed Under the Provisions of Section 18, Shipping Act, 1916, as Amended, and the Provisions of the Intercoastal Shipping Act, 1933, as Amended