[152] Id., Sec. 1.

[153] 54 Stat. 858, August 27, 1940, Sec. 1.

[154] 54 Stat. 1206, October 21, 1940.

[155] 64 Stat. 318, June 30, 1950, Sec. 2.

[156] 64 Stat. 1072, September 27, 1950.

[157] 54 Stat. 885, September 16, 1940.

[158] Id., Sec. 2.

[159] Id., Sec. 3 (a).

[160] Id., Sec. 2 (a), (b).

[161] 54 Stat. 2739, 2745, 2747, 2760.