The year 1998 marked the 20th anniversary of the final reports of the Commission's Pollution From Land Use Activities Reference Group (PLUARG). PLUARG produced a body of work that remains the cornerstone of current thinking about non-point source pollution in the Great Lakes and elsewhere. Twenty years after PLUARG, the Workgroup on Parties Implementation sought to assess the status of non-point source pollution control in the Great Lakes basin, particularly progress by the Parties under Annexes 3 and 13 of the Great Lakes Water Quality Agreement. To that end, the Workgroup sponsored a special session at the Great Lakes soil erosion and sediment control conference, held in Toledo, Ohio, September 16-18, 1998. This report summarizes the findings of that session.