CFR > Title 50 - Wildlife and Fisheries > CHAPTER I—UNITED STATES FISH AND WILDLIFE SERVICE, DEPARTMENT OF THE INTERIOR > SUBCHAPTER B—TAKING, POSSESSION, TRANSPORTATION, SALE, PURCHASE, BARTER, EXPORTATION, AND IMPORTATION OF WILDLIFE AND PLANTS (Parts 10–24) > PART 21—MIGRATORY BIRD PERMITS > SUBPART E—Control of Overabundant Migratory Bird Populations (§21.60 to §21.61)