R.I. Gen. Laws § 40-8-13

The director shall make and promulgate rules, regulations, and fee schedules not inconsistent with state law and fiscal procedures as he or she deems necessary for the proper administration of this chapter and to carry out the policy and purposes thereof, and to make the department’s plan conform to the provisions of the federal Social Security Act, 42 U.S.C. § 1396 et seq., and any rules or regulations promulgated pursuant thereto.