The document summarizes various legal tools used to manage the Great Lakes, including charts, charters, compacts, and the Great Lakes Water Quality Agreement. It describes how the Great Lakes Charter in 1985 was followed by annexes in 2001 and 2005 that established the Great Lakes-St. Lawrence River Basin Sustainable Water Resources Agreement and Compact to govern diversions, consumptive uses, and make the agreements binding. It also discusses the history and revisions of the Great Lakes Water Quality Agreement between the US and Canada to restore water quality in the Great Lakes basin.