Note: I'm not subscribed to this ietf-822 list.
The non-ASCII headers document that used to be called MIME Part 2 is now
called MIME Part 3. I think this would be confusing to many. Many people
use the term "MIME Part 2 headers" or "MIME-2 headers".
I would suggest either:
1. Call it MIME Part 2 as is it used to be, and give some other
document the name MIME Part 3.
2. Don't give them part numbers at all. Just give them more
descriptive names such as "MIME Non-ASCII Headers" or something like