7 Pa. Code § 1.546
Except as provided in § 1.545 (relating to return of adulterated or misbranded products) no carcass, part of a carcass, rendered grease, tallow or other fat derived from the carcasses of livestock, or other meat food product which has not been inspected and passed at an official establishment and is not exempted from such inspection, and no carcass, part of a carcass, fat or other meat food product that is adulterated or misbranded, shall be offered for transportation in commerce by any person unless it is handled in accordance with this subchapter or is denatured or otherwise identified as prescribed in this chapter.
7 Pa. Code § 1.546
This section cited in 7 Pa. Code § 1.210 (relating to shipping of condemned livers; conditions for disposal).