as per his quote on the team's website:
http://www.rytirikladno.cz/cz/rytire...idicky-a-kregl
While it isn't clear, I assume he has a NHL out clause (which shouldn't be a problem as he owns the team).
The issue is if he plays in an European league after the start of the NHL regular season, he will need to go through waivers to sign with a NHL team.