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 18—MARINE MAMMALS > SUBPART A—Introduction (§18.1 to §18.4)