H. No. 3698 / 51 OG No. 7, 3352 (July, 1955)
"SEC. 8. The provisions of this Act shall take effect upon its approval, but, unless otherwise expressly extended by Congress, the increased taxes provided for in this Act shall continue in force and effect only until June thirty, nineteen hundred and ifty-seven, after which period the original rates of tax shall again be in force."SEC. 2. This Act shall take effect upon its approval.