R.I. Gen. Laws § 21-17-5: Advertising — Containers — Invoices.

All advertising of shell eggs shall include the correct size and grade designation in describing the eggs and the correct size and grade designation shall appear in clearly legible letters on the top or side of the exterior of any container in which the eggs are offered for sale. An invoice stating both the correct size and the correct quality grade designations shall accompany each delivery of eggs to a retailer. The invoice shall also include the name and address of both buyer and seller, date of sale, and shall conform to regulations issued by the director of environmental management.