Legal issues for contribution code into Wine

[Dmitry Morovkov]

Hello,
I'm a (mostly windows, but with some linux skills) programmer from russia
who is interested in helping developing Wine, but due to all the mess I read
about the legal issues I want to ask first.

What is Wine's position regarding people who had seen the windows source
code? I tried to search for this topic, and, found this:
http://www.gnu.org/prep/standards/html_node/Reading-Non_002dFree-Code.html

After reading this, it looks like it's ok if someone have seen the windows
source code, and provided he is not going to directly copy unmodified source
code (what a stupid idea!), nor refer to it, he would be considered as a
good/trusted person?

Please clarify this to me.

Regards,
Dmitry Morovkov.