[Code of Federal Regulations] [Title 50, Volume 5] [Revised as of October 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 50CFR27.34] [Page 161] TITLE 50--WILDLIFE AND FISHERIES CHAPTER I--UNITED STATES FISH AND WILDLIFE SERVICE, DEPARTMENT OF THE INTERIOR--(Continued) PART 27_PROHIBITED ACTS--Table of Contents Subpart C_Disturbing Violations: With Vehicles Sec. 27.34 Aircraft. The unauthorized operation of aircraft, including sail planes, and hang gliders, at altitudes resulting in harassment of wildlife, or the unauthorized landing or take-off on a national wildlife refuge, except in an emergency, is prohibited. National wildlife refuge boundaries are designated on up-date FAA aeronautical charts.