U.S. Code > Title 49 Transportation > SUBTITLE VII—AVIATION PROGRAMS (§§ 40101—50105) > PART A—AIR COMMERCE AND SAFETY (§§ 40101—46507) > subpart iv—enforcement and penalties (§§ 46101—46507) > CHAPTER 463—PENALTIES (§§ 46301—46319) > § 46307. Violation of national defense airspace