Law 40 (The wicket-keeper)
1. Protective equipment
The wicket-keeper is the only member of the fielding side permitted to wear gloves and external leg guards. If he does so, these are to be regarded as part of his person for the purposes of Law 41.2 (Fielding the ball). If by his actions and positioning it is apparent to the umpires that he will not be able to discharge his duties as a wicket-keeper, he shall forfeit this right and also the right to be recognised as a wicket-keeper for the purposes of Laws 32.3 (A fair catch), 39 (Stumped), 41.1 (Protective equipment), 41.5 (Limitation of on side fielders) and 41.6 (Fielders not to encroach on the pitch).

2. Gloves
If, as permitted under 1 above, the wicket-keeper wears gloves, they shall have no webbing between the fingers except joining index finger and thumb, where webbing may be inserted as a means of support. If used, the webbing shall be
(a) a single piece of non-stretch material which, although it may have facing material attached, shall have no reinforcement or tucks.

(b) such that the top edge of the webbing
(i) does not protrude beyond the straight line joining the top of the index finger to the top of the thumb.
(ii) is taut when a hand wearing the glove has the thumb fully extended.

See Appendix C.

3. Position of wicket-keeper
The wicket-keeper shall remain wholly behind the wicket at the striker's end from the moment the ball comes into play until
(a) a ball delivered by the bowler
either (i) touches the bat or person of the striker
or (ii) passes the wicket at the striker's end

or (b) the striker attempts a run.

In the event of the wicket-keeper contravening this Law, the umpire at the striker's end shall call and signal No ball as soon as possible after the delivery of the ball.

4. Movement by wicket-keeper
It is unfair if the wicket-keeper standing back makes a significant movement towards the wicket after the ball comes into play and before it reaches the striker. In the event of such unfair movement by the wicket-keeper, either umpire shall call and signal Dead ball. It will not be considered a significant movement if the wicket-keeper moves a few paces forward for a slower delivery.

5. Restriction on actions of wicket-keeper
If, in the opinion of either umpire, the wicket-keeper interferes with the striker's right to play the ball and to guard his wicket, Law 23.3(b)(vi) (Umpire calling and signalling Dead ball) shall apply.
If, however, the umpire concerned considers that the interference by the wicket-keeper was wilful, then Law 42.4 (Deliberate attempt to distract striker) shall apply.

6. Interference with wicket-keeper by striker
If, in playing at the ball or in the legitimate defence of his wicket, the striker interferes with the wicket-keeper, he shall not be out, except as provided for in Law 37.3 (Obstructing a ball from being caught).