(a) No person, firm or corporation shall sell, transport, offer for sale or transportation or receive for transportation in intrastate commerce any carcasses of horses, mules or other equines or parts of any such carcasses or the meat or meat food products thereof unless they are plainly and conspicuously marked or labeled or otherwise identified as required by regulations prescribed by the commissioner to show the kinds of animals from which they were derived.
(b) With respect to establishments at which inspection is maintained under this chapter, such animals and their carcasses, parts thereof, meat and meat food products therefrom shall be prepared in facilities completely physically separated from those in which cattle, sheep, swine or goats are slaughtered or their carcasses, parts thereof, meats or meat food products therefrom are prepared.