Plum Island Preservation Study Act

This bill directs the Secretary of the Interior to study whether Plum Island in New York should be added to the National Park System or National Wildlife Refuge System, or protected through other means. The study must evaluate the island's national significance, consult with relevant agencies and groups, and estimate costs for potential protection options. The Secretary must submit a report to Congress within three years of funding the study, outlining findings and recommendations. The bill itself does not change current protections or management of Plum Island; it only authorizes a study to inform future decisions.