R.I. Gen. Laws § 44-4.1-6

In the event of the failure of the owner to keep the property nondepreciable or to maintain the property according to the commission’s guidelines during the period of the tax reduction, the owner forfeits the property tax reduction retroactive to the date the reduction commenced. All differences in the amount of taxes that were paid and those that would have been due but for the reduction are payable together with interest of twelve percent (12%) per annum from the dates that the payments would have been due and are a lien against the historic residence. If the property is transferred to a new owner within the period that the tax reduction applies, the tax reduction shall cease, and not be applied to the new owner.