Illegal action by the bowler
If the bowler bowls without some part of the front foot (either grounded or raised) behind the batting crease (popping crease).
If the bowler bowls with the back foot not wholly inside the return crease.
If the bowler throws, rather than bowls the ball.
If the bowler changes the arm with which he bowls without notifying the umpire.
If the bowler changes the side of the wicket from which he bowls without notifying the umpire.
If the bowler bowls underarm.
If the ball bounces more than twice, or rolls along the ground, before reaching the batting crease at the striker’s end.
Illegal action by a fielder
If the wicket keeper moves in front of the wicket at the opposite end before the ball passes that wicket or touches the batsman or his bat.
If any fielder touches or passes over the pitch before the ball passes the batsman’s wicket or touches the batsman or his bat.
If, at the instant of delivery, there are more than two fielders, excluding the wicket-keeper, behind the batsman’s popping crease and on the leg side
If, during the first twelve overs at the instant of delivery, there are more than two fielders outside the 30 yard circle.
A bowler will be allowed to bowl one bouncer in each over. (A bouncer is defined as any ball passing above shoulder height but below head height of the batsman’s normal upright standing position)
The Neutral Umpire at the bowling end shall be the final judge of this and will notify the bowler immediately after he has used his quota of one bouncer. Any further such bouncers in that over will simply be declared “No Balls”.
A short-pitched ball passing over head height of the Batsman (Batsman standing in normal upright position at the crease) shall be declared as “No Ball” by either Umpire and will count as one bouncer for the over.
A full toss from a medium or fast bowler, passing the batsman above waist height, (when standing in normal upright standing position at the crease) shall be declared “No Ball” by either Umpire.
All the applicable rules of play for “No Ball” shall apply in such cases.
A full toss from a spinner or slow bowler, passing the batsman above waist height, (when standing in normal position at the crease) is NOT a “No Ball”. However a full toss from the same bowler passing the batsman above shoulder height, (when standing in normal position at the crease) shall be declared “No Ball” by either Umpire
In all such cases the Neutral Umpire shall have the authority to overrule the leg umpire’s decision. .