R.I. Gen. Laws § 42-4-17: State tartan.

(a) The St. Andrews Society of RI, Inc. is authorized to create, authenticate, and register, at the sole expense of the society, the official tartan of the state, to be called “the state of Rhode Island tartan”.

(b) For the purposes of this section, “tartan” means any of many textile patterns consisting of stripes of varying widths and colors crossed at right angles against a solid background, each forming a distinctive design worn by the members of a Scottish clan.