30. The term "putting-green" shall mean the ground within 20 yards of the hole, excepting hazards.
31. All loose impediments may be removed from the putting-green, except the opponent's ball when at a greater distance from the player's than six inches.
32. In a match of three or more sides, a ball in any degree lying between the player and the hole must be lifted, or, if on the putting-green, holed out.
33. When the ball is on the putting-green, no mark shall be placed, nor line drawn as a guide. The line to the hole may be pointed out, but the person doing so may not touch the ground with the hand or club.
The player may have his own or his partner's caddie to stand at the hole, but none of the players or their caddies may move so as to shield the ball from, or expose it to, the wind.
The penalty for any breach of this rule is the loss of the hole.
34. The player or his caddie may remove (but not press down) sand, earth, worm casts, or snow lying around the hole or on the line of his putt. This shall be done by brushing lightly with the hand only across the putt and not along it. Dung may be removed to a side by an iron club, but the club must not be laid with more than its own weight upon the ground. The putting line must not be touched by club, hand, or foot, except as above authorised, or immediately in front of the ball in the act of addressing it, under the penalty of the loss of the hole.
35. Either side is entitled to have the flag-stick removed when approaching the hole. If the ball rest against the flag-stick when in the hole, the player shall be entitled to remove the stick, and if the ball fall in, it shall be considered as holed out in the previous stroke.
36. A player shall not play until the opponent's ball shall have ceased to roll, under the penalty of one stroke. Should the player's ball knock in the opponent's ball, the latter shall be counted as holed out in the previous stroke. If in playing the player's ball displace the opponent's ball, the opponent shall have the option of replacing it.
37. A player shall not ask for advice, nor be knowingly advised about the game by word, look, or gesture from any one except his own caddie, or his partner or partner's caddie, under the penalty of the loss of the hole.