[Code of Federal Regulations] [Title 50, Volume 1] [Revised as of October 1, 2002] From the U.S. Government Printing Office via GPO Access [CITE: 50CFR13.43] [Page 49] TITLE 50--WILDLIFE AND FISHERIES CHAPTER I--UNITED STATES FISH AND WILDLIFE SERVICE, DEPARTMENT OF THE INTERIOR PART 13--GENERAL PERMIT PROCEDURES--Table of Contents Subpart D--Conditions Sec. 13.43 Alteration of permits. Permits shall not be altered, erased, or mutilated, and any permit which has been altered, erased, or mutilated shall immediately become invalid. Unless specifically permitted on the face thereof, no permit shall be copied, nor shall any copy of a permit issued pursuant to this subchapter B be displayed, offered for inspection, or otherwise used for any official purpose for which the permit was issued.