(1) Authority to require documents. The consular officer is authorized to require documents considered necessary to establish the alien's eligibility to receive a nonimmigrant visa. All documents and other evidence presented by the alien, including briefs submitted by attorneys or other representatives, shall be considered by the consular officer.

(2) Unobtainable documents. If the consular officer is satisfied that a document or record required under the authority of this section is unobtainable, the consular officer may accept satisfactory alternative pertinent evidence. A document or other record shall be considered unobtainable if it cannot be procured without causing the applicant or a member of the applicant's family actual hardship as distinct from normal delay and inconvenience.

(3) Photographs required. Every applicant for a nonimmigrant visa must furnish a photograph in such numbers as the consular officer may require. Photographs must be a reasonable likeness, 11⁄2 by 11⁄2 inches in size, unmounted, and showing a full, front-face view of the applicant against a light background. At the discretion of the consular officer, head coverings may be permitted provided they do not interfere with the full, front-face view of the applicant. The applicant must sign (full name) on the reverse side of the photographs. The consular officer may use a previously submitted photograph, if he is satisfied that it bears a reasonable likeness to the applicant.

(4) Police certificates. A police certificate is a certification by the police or other appropriate authorities stating what, if anything, their records show concerning the alien. An applicant for a nonimmigrant visa is required to present a police certificate if the consular officer has reason to believe that a police or criminal record exists, except that no police certificate is required in the case of an alien who is within a class of nonimmigrants classifiable under visa symbols A-1, A-2, C-3, G-1 through G-4, NATO-1 through NATO-4 or NATO-6.