For BAC under .15, IID is discretionary - the judge may or may not impose it. For BAC at .15 or above, IID is mandatory under § 31-27-2(d)(1)(iii). For drug-only first-offense DUI under § 31-27-2(d)(9), the judge can waive IID if blood/urine testing is mandated as an alternative.
Can I get an ignition interlock waived for a first-offense DUI in Rhode Island?RI DUI Laws2026-10-29T22:29:53+00:00