R.I. Gen. Laws § 47-1-1: Standards received from United States as standards for towns.

The weights, measures, and balances received from the United States, and now in the custody of the director of the department of labor and training, and such new weights, measures, and balances as shall be received from the United States as standard weights, measures, and balances in addition thereto or in renewal thereof, shall be the authorized standards by which all town standards of weights and measures shall be tried, proved, and sealed.