let's simplify this discussion, and assume that there just happens to be a situation where images are allowed on a specific wiki, but not on commons - the question is, should they be eligable to the contest. (I think the exact discussion about the copyright status is a bit too complicated to have right here right now - but is of course an important one to answer). 

I think more opinions would be welcome, but my take would be: KISS - only allow images through commons, that would keep the rules the simplest and the tools probably as well. Also that would be the simplest for tourists who might want to participate. 



2011/4/24 Tomasz Ganicz <polimerek@gmail.com>
2011/4/24 Raul Kern <raunator@gmail.com>:
> In Estonian Wikipedia we have a copyright exemption
> (http://wikimediafoundation.org/wiki/Resolution:Licensing_policy) for
> photos of buildings, statues etc., whose authors have not died
> recently (70 years after death hasen't passed yet).
> These photos are tagged with http://et.wikipedia.org/wiki/Mall:KunstiteoseFoto.

Do you mean the pictures of objects of which their architect or author
has not died before 1939 ? What is a legal basis to use these pictures
on Estonian Wikipedia if the freedom of panorama does not work? Is
there any other copyright exemption for such the pictures you can use,
or is just a kind of "fair use"?

If there is any exempt in Estonian copyright law, except fair use -
which allows to use such these pictures in Estonian Wikipedia - there
is no reason why not to let it upload to Commons...  Simply this
exempt should be properly described on Commons.

Tomek "Polimerek" Ganicz