Iowa Code § 708B.1: Anthrax.

1. Any person who knowingly possesses bacillus anthracis or any substance containing bacillus anthracis is guilty of a class “C” felony.

2. Any person who knowingly distributes bacillus anthracis or any substance containing bacillus anthracis to any other person, which may or may not cause exposure to bacillus anthracis, is guilty of a class “B” felony.

3. This section shall not apply to a person who possesses or distributes bacillus anthracis or any substance containing bacillus anthracis which is being used solely for a purpose which is lawfully authorized under federal law.