The 5-year cycles for IDPs seem fairly straight forward. However, the 6-year cycle for prototypes and volume submitters has me hopelessly confused. I am lost in Rev. Proc. 2007-44 land right now. The way I read it, the EGTRRA remedial amendment period ends on January 31, 2011. However, I have read in numerous other places that the plans must be amended/restated and (if necessary) filed with the IRS by April 30, 2010. However, I can't find the April 30 date in any of the guidance, including Rev. Proc. 2008-56 (unless I am blind). Can somebody help me nail this down once and for all? It would be most appreciated!

You aren't blind. See Announcement 2008-23: http://www.legalbitstream.com/scripts/isys...y/irla46a/1/doc

Many, many thanks! I can see after all. I just overlooked an important announcement.