9 C.F.R. § 95.25
Dried blood or blood meal, lungs or other organs, tankage, meat meal, wool waste, wool manure, and similar products, for use as fertilizer or as feed for domestic animals, shall not be imported except subject to handling and treatment in accordance with paragraphs (a), (b), and (c) of § 95.27, unless:
[28 FR 5981, June 13, 1963, as amended at 62 FR 56024, Oct. 28, 1997. Redesignated at 78 FR 73003, 73007, Dec. 4, 2013; 83 FR 15494, Apr. 11, 2018]