No person engaged in the business of buying, selling, transporting in commerce, or importing, dead animals or any parts of the carcasses of any animals that died other than by slaughter shall buy, sell, transport, offer for sale or transportation, receive for transportation in commerce, or import any dead cattle, sheep, swine, goats, horses or other equines or parts of carcasses of any such animals which have died other than by slaughter, unless such transaction, transportation or importation is in compliance with and provided for in this Act.