Section is comprised of the fifth par. of section 13 of act Dec. 23, 1913, as amended. The fifth par. constituted the third par. of section 13 in 1916 (39 Stat. 752), became the fourth par. in 1923 (42 Stat. 1478), and became the fifth par. in 1932 (47 Stat. 715). For further details, see Codification notes set out under sections 343 and 344 of this title. For classification to this title of other pars. of section 13, see Codification note set out under section 342 of this title.

1930—Act Apr. 12, 1930, among other changes, inserted proviso.