MARITIME Act

Declares U.S. policy that sea level rise caused by climate change should not cause an island or coastal State to lose its statehood or maritime zones, and commits the United States to encourage other countries to adopt the same approach and to publish stable coastal baselines. Requires the Secretary of State, with other federal agencies, to deliver an unclassified report to Congress (with an optional classified annex) within 120 days of enactment describing U.S. diplomatic efforts, barriers encountered, and which countries or organizations have adopted related policies.