R.I. Gen. Laws § 20-5-20: Appropriations and disbursements.

The general assembly shall annually appropriate any sums it may deem sufficient to be expended by the department of environmental management under the provisions of this chapter; and the state controller is authorized and directed to draw orders upon the general treasurer for those sums that may, from time to time, be required, upon receipt by him or her of proper vouchers approved by the director of environmental management.