R.I. Gen. Laws § 47-15-3: Exemptions.

The provisions of this chapter do not apply:

(1) To a sale of a commodity when the sale is made from bulk and the quantity is weighed, measured, or counted for the immediate purpose of the sale;

(2) To the sale of a commodity in any container of a net weight of one-half ounce (½ oz.) or less avoirdupois, or of a net measure of one-half (½) fluid ounce or less, or when the net count, other than by linear measure, is less than six (6), and the contents are readily visible;

(3)(i) To a sale of medicine when prescribed by a licensed physician, veterinarian, or dentist, or to a sale of medicinal or pharmaceutical preparations of mixtures of two (2) or more medicinal substances.

(ii) This subdivision shall not be construed as exempting products from the requirements of accuracy in statements of total physical weight, counts, and measures.