R.I. Gen. Laws § 2-17-11: Rules as to transportation and planting.

The director of environmental management shall make any rules and regulations that he or she may deem expedient in combatting the disease with reference to the transportation of five (5) leaved pine trees and species of the genus ribes, or wood, lumber or other material derived from those trees, or shrubs, or in regard to the planting of those trees or shrubs.