Detailed answer is: it depends on what you need:
- using PrivateGSM
- selling PrivateGSM
- exporting PrivateGSM
They have different legal constraints.
As of September 2013, short answer is:
- Use is allowed everywhere, with no limitation.
- Sell in country is restricted, unless authorized by relevant authorities, in Iran, Russia, China.
- Export from EU is restricted to Iran, Russia, China and North Korea.