(1)  Trees may be registered as rootstock and top-stock sources for the propagation of certified nursery stock when inspected, tested, and found to be true-to-name and discernibly free from harmful virus and virus-like diseases by procedures outlined in this program.

(2)  Certification verifies that proper field sampling procedures were followed and that the indexing results indicated are those determined by an approved governmental agency designated to test for virus diseases in nursery stock.

(3)  Participation in this program shall be voluntary.