Mich. Admin. Code R. 285.628.9
Rule 9. Each lot of seed shall be inspected for grade at the time of shipping to complete the certification process. The inspection may be made by the federal-state inspection service or by the certifying agency. A shipping time inspection for grade shall be made each time a load of seed potatoes is transferred or shipped, unless, at the discretion of the inspector and certifying agency, the lot can be adequately assessed and certified by inspecting less than every load based on the fact that a representative portion of the lot has been inspected and approved. This overall seed lot certification requires an inspection of the initial load shipped from each lot, an overall assessment of the lot for uniformity, and at least 1 load for each purchaser. A certificate of inspection shall accompany each shipment. Inspection protocols for lot certification shall be approved by the director of the department of agriculture based on the certifying agency's ability to adequately verify the condition of the entire lot.
Mich. Admin. Code R. 285.628.9