Former chapter 7 of this title included the provisions of the several Chinese Exclusion acts, beginning with the temporary act of May 6, 1882, ch. 126, 22 Stat. 58, which, as being then in force, were, by act Apr. 27, 1904, ch. 1630, Sec. 5, 33 Stat. 428, amending act Apr. 29, 1902, ch. 641, 32 Stat. 176, ''re-enacted, extended, and continued, without modification, limitation, or condition;'' with the further provisions of the act and those of subsequent acts relating to the subject which remained in force