Tariff regulations governing publication, posting, and filing of maximum rates, fares, and charges by common carriers by water in interstate commerce, prescribed by Shipping Board pursuant to provisions of sec. 18 of shipping act, 1916, 39 Stat. L., 728, 735, effective Apr. 30, 1920, reissued Dec. 1, 1929, amended effective Nov. 15, 1931, amended Not. 16, 1932.

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