Urges parties to 1954 U.S. Supreme Court Decree to address ongoing risk of Delaware River Basin flooding.

ACR 21 is a resolution urging New Jersey and other states (New York, Pennsylvania, Delaware) to petition the U.S. Supreme Court to amend a 1954 decree governing Delaware River Basin flooding. The decree currently allows New York City to fill reservoirs to 105% capacity during May 1-June 15 - a period when historical floods occurred - reducing flood control downstream. The resolution cites studies showing 20% year-round voids (space left in reservoirs) could prevent flooding in areas like Trenton, Ewing, and Phillipsburg, protecting nearly 2 million New Jersey residents who rely on the river. It specifically requests states to seek Court action to require these voids, which would minimize flood damage to properties and infrastructure. As a concurrent resolution, it does not create new law but formally requests federal court action.