In lieu of corporate surety the manufacturer of tobacco products may pledge and deposit, as security for his bond, securities which are transferable and are guaranteed as to both interest and principal by the United States, in accordance with the provisions of 31 CFR part 225.

(61 Stat. 650, 72 Stat. 1421; 6 U.S.C.9301, 9303; 26 U.S.C. 5711)