8 U.S.C. § 1446: Investigation of applicants; examination of applications

Before a person may be naturalized, an employee of the Service, or of the United States designated by the Attorney General, shall conduct a personal investigation of the person applying for naturalization in the vicinity or vicinities in which such person has maintained his actual place of abode and in the vicinity or vicinities in which such person has been employed or has engaged in business or work for at least five years immediately preceding the filing of his application for naturalization. The Attorney General may, in his discretion, waive a personal investigation in an individual case or in such cases or classes of cases as may be designated by him. The Attorney General shall designate employees of the Service to conduct examinations upon applications for naturalization. For such purposes any such employee so designated is authorized to take testimony concerning any matter touching or in any way affecting the admissibility of any applicant for naturalization, to administer oaths, including the oath of the applicant for naturalization, and to require by subpena the attendance and testimony of witnesses, including applicant, before such employee so designated and the production of relevant books, papers, and documents, and to that end may invoke the aid of any district court of the United States; and any such court may, in the event of neglect or refusal to respond to a subpena issued by any such employee so designated or refusal to testify before such employee so designated issue an order requiring such person to appear before such employee so designated, produce relevant books, papers, and documents if demanded, and testify; and any failure to obey such order of the court may be punished by the court as a contempt thereof. The record of the examination authorized by this subsection shall be admissible as evidence in any hearing conducted by an immigration officer under section 1447(a) of this title . Any such employee shall, at the examination, inform the applicant of the remedies available to the applicant under section 1447 of this title . The record of the examination upon any application for naturalization may, in the discretion of the Attorney General be transmitted to the Attorney General and the determination with respect thereto of the employee designated to conduct such examination shall when made also be transmitted to the Attorney General. The employee designated to conduct any such examination shall make a determination as to whether the application should be granted or denied, with reasons therefor. After an application for naturalization has been filed with the Attorney General, the applicant shall not be permitted to withdraw his application, except with the consent of the Attorney General. In cases where the Attorney General does not consent to the withdrawal of the application, the application shall be determined on its merits and a final order determination made accordingly. In cases where the applicant fails to prosecute his application, the application shall be decided on the merits unless the Attorney General dismisses it for lack of prosecution. An applicant for naturalization who moves from the district of the Service in the United States in which the application is pending may, at any time thereafter, request the Service to transfer the application to any district of the Service in the United States which may act on the application. The transfer shall not be made without the consent of the Attorney General. In the case of such a transfer, the proceedings on the application shall continue as though the application had originally been filed in the district of the Service to which the application is transferred.