Any alien lawfully admitted for permanent residence, or (2) any alien lawfully admitted to the United States pursuant to clause 6 of section 3 of the Immigration Act of 1924, between July 1, 1924, and July 5, 1932, both dates inclusive, who intends to depart temporarily from the United States may make application to the Attorney General for a permit to reenter the United States, stating the length of his intended absence or absences, and the reasons therefor. Such applications shall be made under oath, and shall be in such form, contain such information, and be accompanied by such photographs of the applicant as may be by regulations prescribed.