Actually the closed fist thing has always been banned. That is just a rule of wrestling in general. In wrestling bouts, all wrestlers are supposed to use an open hand thrust or slap or their forearms. This has been a rule since the old days of kayfabe, so that people wouldn't question the legitimacy of the fights, i.e. how can they take all those punches and not get concussed after lengthy periods when in boxing even with gloves they get knocked out. Fists are used occassionally to make it look more brutal but the punches rarely connect with enough force to cause any damage.
Paul London's Double moonsault.
Rey's West Coast Pop.
Shane Helms's Vertebreaker
Any pildriver other than the tombstone
All front and rear mounted drivers
Shooting Star Press
450, 540, 630 degree splashes
Variations of the brain-buster.
Use of springboard moves has been limited.
Use of inzughiri (no idea how to spell it) has been limited.
and im not sure about this one but I suspect Booker T's Missile Dropkick.
Theres a few other things too, but cant think of them off the top of my head.