Iowa Admin. Code r. 21-64.8
Any animal slaughtered in Iowa is subject to having blood samples taken in order to determine whether the animal is infected with an infectious or contagious disease. Upon written notification from the department or from the United States Department of Agriculture, the management of a slaughter facility shall provide for or permit the collection of blood samples for testing from any animal confined at or being slaughtered at such a facility.
If the department or the United States Department of Agriculture chooses to place government employees or private contractors in the facility for the purpose of collecting the blood samples, neither the facility nor the management of the facility shall charge a fee for providing such access. In addition, the slaughter facility shall provide blood collectors access to facilities routinely available to plant employees such as rest rooms, lockers, break rooms, limchrooms, and storage facilities to facilitate blood collection in the same manner and on the same terms as the facility provides access to the facility to meat inspectors employed by the department or the Food Safety Inspection Service of the United States Department of Agriculture.
Iowa Admin. Code r. 21-64.8