R.I. Gen. Laws § 33-15-29: General duties of limited guardians or guardians with respect to person and estate.

Every limited guardian or guardian with authority to make decisions with respect to the person of his or her ward shall exercise authority in the best interest of his or her ward. Every limited guardian or guardian with authority to make decisions with respect to the estate of his or her ward shall manage the estate frugally, without waste, and shall apply the income and profits from the estate, or so much thereof as may be necessary and proper, to the support and maintenance of the ward and his or her household and family.