(1) Only registered trees are permitted in a registered stool bed.

(2) Registered stool beds must be at least ten feet from nonregistered plants of the Rosaceae family.

(3) The ground in a stool bed and for a distance of at least ten feet on all sides around it must be kept clean cultivated.

(4) Registered stool beds must be planted with foundation or registered planting stock. Certified rootstocks from programs approved by the department may also be used, provided the resulting stock in the stool bed is tested and found free of virus and virus-like diseases prior to harvest of certified rootstock.