Far too many places that could be an acceptable source.
Beckett is the only non-acceptable source we are currently aware of.
A good way to determine is the source is ok to to ask yourself who originally created the data? If it's a person or organization that has placed a copyright on that data then we can't use it.
If you're not sure, just ask us to review the source. I'll try to give you a quick yes/no.
- Jon