R.I. Gen. Laws § 23-27.3-105.2: Change in use and occupancy.

It is unlawful to make any change in the use or occupancy of any structure or part of it which would subject it to any provision of this code, including the rehabilitation building and fire code for existing buildings and structures, without the approval of the building official and without the issuance of a certificate of occupancy indicating that the structure complies with the provisions of this code, or the rehabilitation building and fire code for existing buildings and structures as appropriate, for proposed new use or occupancy and that the change does not result in any greater hazard to public health, safety, and welfare.