I would appreciate commentary and analysis.I'd also like to know if this simple enough that we could recommend it forusage more broadly. [...]
Confusing but probably consistent. I wouldn't be happy recommending this for general use.
In the copyright holder's understanding, re-imposition of therequirements of sections 2a and and 2c by those creating a derivativework is not allowed, since those restrictions never attached to this work; see section 6. [...]
I don't follow the reasoning of this part. The GPL section 6 says any "recipient automatically receives a license from the original licensor to copy, distribute or modify the Program subject to these terms and conditions" and I thought "these" was the GPL, not GPL + any extras. Therefore, 2a and 2c further restrictions must be applied to the entire work by any redistributor, as you only stated a proviso rather than granted a general exception to 2a and 2c, didn't you?
Then again, I wouldn't argue this in court unless forced :D -- MJR/slef My Opinion Only and not of any group I know http://www.ttllp.co.uk/ for creative copyleft computing "Matthew Garrett is quite the good sort of fellow, despite what my liver is sure to say about him in [...] 40 years" -- branden