96.4—Uncertified animal casings; disposition.
Animal casings which are unaccompanied by the required certificate, those shipped in sheepskins or other skins as containers, and those found upon inspection to be unclean or unsound when offered for importation into the United States shall be kept in customs custody until exported or destroyed, or until disinfected and denaturated as prescribed by the Administrator, Animal and Plant Health Inspection Service (APHIS) in §§ 96.5 through 96.16.