R.I. Gen. Laws § 2-14-7: Powers and duties of wardens.

The tree warden shall expend all sums which are appropriated for the setting out, care and maintenance of trees and shrubs on roads and public places under his or her control. He or she shall enforce all provisions of law for the preservation of those trees and shrubs and may make suitable regulations governing the care and preservation of those trees and shrubs as he or she may deem expedient, and those regulations are subject to the approval of the town or city council.