The Manifest Modernization Act of 2025 amends the Tariff Act of 1930 to significantly enhance the public disclosure of information for goods arriving in the United States. It mandates that manifest data for vehicles and aircraft , in addition to vessels, be made publicly available, broadening the scope of transport modes subject to transparency requirements. The bill expands the types of information disclosed, requiring manifests to include Harmonized Tariff Schedule subheadings for cargo classification and details on the country of origin and last country of transport for cargo. Additionally, it formally defines "aircraft" within the Tariff Act, with all amendments applying to relevant arrivals 30 days after enactment.