R.I. Gen. Laws § 39-26.6-6: Permanence of tariff terms once set.

It is the intention of the general assembly in enacting this chapter that the developers, owners, investors, customers, and lenders of the distributed-generation projects receiving performance-based incentives under the tariffs be able to rely on the tariffs for the entire term of the applicable tariff for purposes of obtaining financing. Consistent with that intention and expectation, the terms under the tariffs for a given program year, once approved by the commission, shall not be altered in any way that would undermine such reliance on those tariffs during the applicable terms of the tariffs; and in no circumstance will the performance-based incentive rate paid to a renewable energy project developer or owner be reduced during the term of the tariff once a renewable energy project has qualified to receive a tariff under the terms of this chapter.