Fouls:
1: Butting with the head.
2: Eye gouging of any kind.
3: Biting.
4: Hair pulling.
5: Fish hooking.
6: Groin attacks of any kind.
7: Putting a finger into any orifice or into any cut or laceration on an opponent.
8: Small joint manipulation.
9: Striking to the spine or the back of the head.
10: Striking downward using the point of the elbow.
11: Throat strikes of any kind, including, without limitation, grabbing the trachea.
12: Clawing, pinching or twisting the flesh.
13: Grabbing the clavicle.
14: Kicking the head of a grounded opponent.
15: Kneeing the head of a grounded opponent.
16: Stomping a grounded opponent.
17: Kicking to the kidney with the heel.
18: Spiking an opponent to the canvas on his head or neck.
19: Throwing an opponent out of the ring or fenced area.
20: Holding the shorts or gloves of an opponent.
21: Spitting at an opponent.
22: Engaging in an unsportsmanlike conduct that causes an injury to an opponent.
23: Holding the ropes or the fence.
24: Using abusive language in the ring or fenced area.
25: Attacking an opponent on or during the break.
26: Attacking an opponent who is under the care of the referee.
27: Attacking an opponent after the bell has sounded the end of the period of unarmed combat.
28: Flagrantly disregarding the instructions of the referee.
29: Timidity, including, without limitation, avoiding contact with an opponent, intentionally or consistently dropping the mouthpiece or faking an injury.
30: Interference by the corner.
31: Throwing in the towel during competition.
fouls that directly hinder a striker:
4
9
10
11
14
15
16
17
So a little over 1/3 of the fouls are directed at strikers. This doesn't say anything about people who like to stay on the ground, it just limits the ability of people who prefer to strike as a means of attacking. The limitations on some of those dirty techniques also alter the way you defend against submissions on the ground. Now I don't know if you would call JKD a traditional art, but given these rules alot of what JKD'ers do, both stand up and on the ground is out of bounds in the UFC. And if you think UFC is a street art, go roll around on a sidewalk. You don't have to do stand up-takedown, just do UFC style fighting on a hard un-even surface. Do it in full street cloths (that's another thing.. shin kicks are not nearly as effective without shoes)..
Bottom line is to fight in the UFC I would have to change major elements of my training focus, yet to fight on the street I would not.. which brings up another element.. if you fight someone on the street they can quite effectively employ other methods than what you train against, in otherwords UFC style fighting can NOT be used as a scale to rate martial arts for street effectiveness because you can't fight against what you would fight against on the street. It's comparing apples and oranges.
The above was taken from another post here ... and I can't remember who it was that wrote it