Encouraging and Harboring Illegal Aliens
It is a violation of law for any person to conceal, harbor, or shield from detection in any place, including any building or means of transportation, any alien who is in the United States in violation of law. HARBORING MEANS ANY CONDUCT THAT TENDS TO SUBSTANTIALLY FACILITATE AN ALIEN TO REMAIN IN THE U.S. ILLEGALLY.
The sheltering need not be clandestine, and harboring covers aliens arrested outdoors, as well as in a building. This provision includes harboring an alien who entered the U.S. legally but has since lost his legal status.