Section R. 285.619.21 - Nursery stock, understock, and seed; designationRule 21.
(1) Finished fruit tree nursery stock, understocks or understock seed, when certified according to these rules, may be offered for sale or sold as: (a) "Grown from certified virus-free scionwood" when produced from certified scionwood.(b) "Michigan certified virus-free fruit trees" when produced from certified scionwood and understocks.(c) "Michigan certified virus-free understocks" when produced from certified seed or clonal sources.(2) The use of such terms as virus-free, grown from certified virus-free scionwood, certified virus-free, Michigan certified virus-free fruit trees, Michigan certified virus-free understocks, Michigan certified virus-free scionwood, and such other term or terms that may be so construed to describe fruit tree nursery stock, scionwood, understocks, or understock seed, shall be restricted to that nursery stock, scionwood, understocks, or understock seed so certified under these rules.Mich. Admin. Code R. 285.619.21