No. 77-1604. Argued January 9, 1978. Decided February 23, 1978. Filindo B. Masino, Berk, Masino, Moonblatt McDougall, Philadelphia, Pa., for petitioners. Philip Wilens, Chief, Government Regulations and Labor Section, Crim. Div., James P. Morris, Chester J. Halicki, Dept. of Justice, Washington, D.C., for respondent. Petition for review from the Board of Immigration Appeals. Before ADAMS, BIGGS and WEIS, Circuit Judges. OPINION OF THE COURT ADAMS, Circuit Judge. This case presents a challenge to