R.I. Gen. Laws § 46-12.2-22: Tax exemption.

Bonds issued by the agency and local governmental obligations issued by any local governmental unit in accordance with this chapter or chapter 18 of title 24, their transfer and the income therefrom, including any profit made on the sale thereof, shall, at all times, be exempt from taxation by and within the state. The agency shall not be required to pay any taxes, assessments, or excises upon its income, existence, operation, or property.