R.I. Gen. Laws § 42-28-11
The superintendent shall be the executive and administrative head of the state police, and he or she is hereby authorized, subject to the approval of the governor, to make rules and regulations not inconsistent with law for the examination and qualifications of applicants for appointment to the state police, for the discipline, control, and removal of the other members and relating to reimbursement for expenses properly incurred in the performance of their official duties, including an allowance for subsistence in an amount not less than six hundred dollars ($600) per annum for members of the state police below the rank of lieutenant and in an amount not less than nine hundred dollars ($900) per annum for members of the state police with the rank of lieutenant or higher than the rank of lieutenant.
R.I. Gen. Laws § 42-28-11