No inedible grease, inedible tallow, or other inedible rendered fat shall be imported into the United States unless it has been first denatured as prescribed in § 327.25 of this part and the containers marked as prescribed by § 316.15 of this subchapter or unless it is identified and handled as prescribed by § 325.11(b) or (c) of this subchapter.
9 C.F.R. §327.20