Matter of Kazemi, 19 I&N Dec. 49, 51 (BIA 1984) (We have long held that an application for admission to the United States is a continuing application and admissibility is determined on the basis of the law and the facts existing at the time the application is finally considered.) (emphasis added); Matter of Ching and Chen, 19 I&N Dec. 203 (BIA 1984); Matter of Alarcon, 20 I&N Dec. 557 (BIA 1992).