Grading is a voluntary service paid for by poultry processors. Not all poultry is USDA graded. U.S. Inspected Poultry Inspection refers to the safety of poultry and poultry products and the accuracy of their labels. Both the products and the plants' systems for sanitation and preparation of products are inspected to assure that they are safe. Inspection involves only those properties related to wholesomeness and labeling, not quality.
Inspection is mandatory and required by law, with minor exceptions.