39. In case any substitute shall be allowed to run between wickets, the striker may be run out if either he or his substitute be out of his ground. If the striker be out of his ground while the ball is in play, the wicket which he has left may be put down and the striker given out, although the other batsman may have made good the ground at that end, and the striker and his substitute at the other end.
40. A batsman is liable to be out for any infringement of the Laws by his substitute.
The Fieldsman 41. The Fieldsman may stop the ball with any part of his The Fieldsman person; but if he wilfully stop it otherwise, the ball shall be "dead," and five runs added to the score; whatever runs may have been made, five only shall be added.
Wicketkeeper. 42. The Wicket-keeper shall stand behind the wicket. If he shall take the ball, for the purpose of stumping, before it has passed the wicket, or, if he shall incommode the striker by any noise or motion, or, if any part of his person be over or before the wicket, the striker shall not be out, excepting under Laws 26, 27, 28, 29, and 30.
Duties of Umpires. 43. The Umpires are the sole judges of fair or unfair play, of the fitness of the ground, the weather, and the light for play. All disputes shall be determined by them, and if they disagree, the actual state of things shall continue.
44. They shall pitch fair wickets, arrange boundaries where necessary, and the allowances to be made for them, and change ends after each side has had one innings.
45. They shall allow two minutes for each striker to come in, and ten minutes between each innings. When they shall call "Play," the side refusing to play shall lose the match.
46. They shall not order a batsman out unless appealed to by the other side.
47. The umpire at the bowler's wicket shall be appealed to before the other umpire in all cases, except those of stumping, hit wicket, run out at the striker's wicket, or, arising out of Law 42; but in any case in which an umpire is unable to give a decision, he shall appeal to the other umpire, whose decision shall be final.
48. If the umpire at the bowler's end be not satisfied of the absolute fairness of the delivery of any ball, he shall call "No Ball."
48a. The Umpire shall take especial care to call "No Ball" instantly upon delivery; "Wide Ball" as soon as it shall have passed the striker.