One of the main things you need to do this is permission from the game company in writing, because you will be using the name of the game, which is their trademark. If you are running the tournament in a rented space, you will need to have whatever zoning and licensing is required to run an event in that space. That is why it would be best to rent a space that is already zoned and insured to hold events, such as a convention center. Much of what you need to know, you will learn by doing.
Answered on Mar 25th, 2014 at 1:58 PM