The 2nd source for the one-design rudder was discussed at the Board of Governors meeting at the Annapolis 2007 NAs. Look at my post (8th one down) in this thread with the report I gave on this topic at the SNE District meeting in November: https://j30.us/ubbthreads/ubbthreads.php/topics/1242/Re_J_30_Southern_New_England_M.html