The Plum Island Preservation Act aims to ensure the long-term protection and management of Plum Island, a federal property in New York. The main objectives of this legislation are to promote ecological conservation, celebrate the island's historical and cultural significance, and maintain public access to the area. Key provisions of the Act include a mandate for the Administrator of General Services to begin a formal process for developing an ecological management plan for Plum Island within 180 days of the law's enactment.