R.I. Gen. Laws § 47-2-5
After the expiration of the time limited in the notification which is required to be given in § 47-2-4, the sealer of weights and measures in every town or city shall visit the places of business, and enter upon the carts, wagons, and other vehicles then in use for business, of all the persons engaged in the trade of buying and selling or of selling, who have weights, measures, or balances which have not been sealed during the current calendar year, and try, adjust, and seal the weights, measures, or balances. The sealer shall go, at least once in every six (6) months, to every hay scale, coal scale, wagon scale, railroad track scale, or platform scale or balance used in the trade of buying and selling or of selling or for public weighing, in his or her town or city, which is not brought to him or her under the provisions of § 47-2-4, and try, adjust, and seal the scale or balance.
R.I. Gen. Laws § 47-2-5