what sorts of things are required for WGA Standard

Some modules, e.g. some for Stalingrad and for The Russian Campaign say they are WGA standard.
I was able to find out that this has something to do with wargameacademy.org, but I didn’t find anything about what sorts of things the standard demands of a module. Any explanations or references?

I don’t think anybody cares other than Bill what’s-his-name who owns the WGA website.