H. No. 3699 / 51 OG No. 7, 3348 (July, 1955)
“SEC. 7. The provisions of this Act shall take effect upon ts approval but, unless otherwise expressly extended by congress, the increased taxes provided for in this Act shall continue in force and effect until June thirty, teen hundred and fifty-seven, after which period original rates of tax shall again be in force."SEC. 2. This Act shall take effect upon its approval