Law 41 (The fielder)
1. Protective equipment
No member of the fielding side other than the wicket-keeper shall be permitted to wear gloves or external leg guards. In addition, protection for the hand or fingers may be worn only with the consent of the umpires.

2. Fielding the ball
A fielder may field the ball with any part of his person but if, while the ball is in play he wilfully fields it otherwise,
(a) the ball shall become dead and 5 penalty runs shall be awarded to the batting side. See Law 42.17 (Penalty runs). The ball shall not count as one of the over.

(b) the umpire shall inform the other umpire, the captain of the fielding side, the batsmen and, as soon as practicable, the captain of the batting side of what has occurred.

(c) the umpires together shall report the occurrence as soon as possible to the Executive of the fielding side and any Governing Body responsible for the match who shall take such action as is considered appropriate against the captain and player concerned.

3. Protective helmets belonging to the fielding side
Protective helmets, when not in use by fielders, shall only be placed, if above the surface, on the ground behind the wicket-keeper and in line with both sets of stumps. If a helmet belonging to the fielding side is on the ground within the field of play, and the ball while in play strikes it, the ball shall become dead. 5 penalty runs shall then be awarded to the batting side. See Laws 18.11 (Runs scored when ball becomes dead) and 42.17 (Penalty runs).

4. Penalty runs not to be awarded
Notwithstanding 2 and 3 above, if from the delivery by the bowler the ball first struck the person of the striker and if, in the opinion of the umpire, the striker
neither (i) attempted to play the ball with his bat,
nor (ii) tried to avoid being hit by the ball,
then no award of 5 penalty runs shall be made and no other runs or penalties shall be credited to the batting side except the penalty for a No ball if applicable. See Law 26.3 (Leg byes not to be awarded).

5. Limitation of on side fielders
At the instant of the bowler's delivery there shall not be more than two fielders, other than the wicket-keeper, behind the popping crease on the on side. A fielder will be considered to be behind the popping crease unless the whole of his person, whether grounded or in the air, is in front of this line.
In the event of infringement of this Law by the fielding side, the umpire at the striker's end shall call and signal No ball.

6. Fielders not to encroach on the pitch
While the ball is in play and until the ball has made contact with the bat or person of the striker, or has passed the striker's bat, no fielder, other than the bowler, may have any part of his person grounded on or extended over the pitch.
In the event of infringement of this Law by any fielder other than the wicket-keeper, the umpire at the bowler's end shall call and signal No ball as soon as possible after the delivery of the ball. Note, however, Law 40.3 (Position of wicket-keeper).

7. Movement by fielders
Any significant movement by any fielder after the ball comes into play and before the ball reaches the striker is unfair. In the event of such unfair movement, either umpire shall call and signal Dead ball. Note also the provisions of Law 42.4 (Deliberate attempt to distract striker).

8. Definition of significant movement
(a) For close fielders anything other than minor adjustments to stance or position in relation to the striker is significant.

(b) In the outfield, fielders are permitted to move in towards the striker or striker's wicket, provided that 5 above is not contravened. Anything other than slight movement off line or away from the striker is to be considered significant.

(c) For restrictions on movement by the wicket-keeper see Law 40.4 (Movement by wicket-keeper).