In the New York State area the Mixed Martial Arts discipline it's unlegal because considered too dangerous. Since years there is a huge discussion going on about this topic.
The discipline is anyway tought in a few NYC gyms due to the high demand of people interested in this sport.
Legally it can be practiced, until is not taken at a competition level. But for many guys, willing to emerge in this sport,
there's no point in spending a week in the gym without the possibility of seeing the result of their work.