[Foundation-l] External free image repositories

[Strainu]

Hi,

Has the foundation ever expressed an opinion on using external free
image repositories in WMF projects? The licensing policy only says
that the content should be free, but without the specific limitations
that are present on Commons. I was wondering if it would be acceptable
for a project to serve (without hosting) content that is PD in another
country (presumably the country with the project's language as an
official language) but not in the US.

And if it would be, how could we ensure that the project would indeed
be for free images only?

Thanks,
  Strainu