This report assessed the feasibility and potential effects of providing nutrition assistance to Puerto Rico under the Supplemental Nutrition Assistance Program instead of through its Nutritional Assistance Program (NAP), an annually funded block grant. Specifically, it examined the potential impact of such a transition on eligibility standards, benefit determination, operational procedures, administrative burden, and costs to the U.S. Government and the Government of Puerto Rico. Study methods included a document review; semistructured interviews with Puerto Rico NAP staff and other stakeholders, such as NAP participants; a microsimulation model; and a cost assessment.