Request for clarification on how a contribution to gcc can be made

[Thomas Klein <th dot r dot klein at web dot de>]

Hello

To me it looks like that what is described in the online document 
<http://gcc.gnu.org/contribute.html>  is either not correct or is being 
misinterpreted at least by me.
It's not clear to me at which point the FSF is trusting an individual 
(or organization or company) and why it is mistrusting an individual per 
default.
Is there a way to suggest a code changes.
What kind of paper work is required for small code changes and what for 
huge code changes.
If a potential change is reviewed and accepted by a maintainer, who has 
to commit the change and when are they made.
(In assumption the person who is asking for a change usually did not 
have svn write permission.)
A clarification at GCC side would reduce frustration for people like me.

Regards
  Thomas