Section 42.23 - Certain former U.S. citizens(b)Military expatriates. An alien shall be classifiable as a special immigrant under INA 101(a)(27)(B) if the consular officer is satisfied by appropriate evidence that the alien was formerly a U.S. citizen and that the alien lost citizenship under the circumstances set forth in INA 327.56 FR 49676, Oct. 1, 1991, as amended at 85 FR 38322 , June 26, 2020