R.I. Gen. Laws § 17-15-21
Before permitting any person to vote in a primary election, the warden or clerk and bipartisan pair of supervisors assigned by the warden shall ascertain from the voting record appearing on the certified voting list that the voter is not disqualified to vote by the provisions of § 17-15-24. The bipartisan pair of supervisors shall provide the voter with the corresponding computer ballot for the primary election in which the voter is eligible and desiring to vote. The warden shall take any steps that may be necessary to assure that each voter is given the computer ballot upon which the voter is eligible to vote. Any person who is not affiliated with any political party, and is otherwise qualified to vote, may participate in a primary election of either party.
R.I. Gen. Laws § 17-15-21