R.I. Gen. Laws § 20-8.1-5
No person shall take shellfish from the waters of polluted areas, or knowingly sell shellfish taken from the waters of polluted areas, except pursuant to a transplant program specifically authorized by and conducted under the direct supervision of the director. In granting permission, the department of environmental management shall first obtain the written approval of the director of the department of health as to the suitability and safety for the purposes intended. The possession by any person of shellfish while in a vessel upon the waters of polluted areas between the hours of two (2) hours after sunset and sunrise shall be prima facie evidence that those shellfish were taken by that person in violation of this section.
R.I. Gen. Laws § 20-8.1-5