In a competition you cannot ask or tell a competitor the club you used to play Rule 8-1
On the putting green you cannot touch the green to show the line in which you intend to hit the ball Rule 8-2
On the putting green you cannot repair spike marks from golf shoes until the hole is completed Rule 16-1
On the putting green you cannot tap down lumps in the green apart from pitch marks You can brush away sand and loose soil. Rule 16-1
If when on the putting on the green your ball hits the flag it is a two stroke penalty Rule 17-3
If when on the putting on the green your ball hits another ball on the green it is a two stroke penalty Rule 19-5
You can remove loose twigs, branches and stones which is near your ball except when in a hazard, but if the ball moves it is a penalty Rule 23-1
You can only remove stones from bunkers. Leaves, twigs and branches cannot be moved. Rule13-4
When playing from a hazard (water or bunker) you cannot ground your club or it is a two stroke penalty. You have to hover the club head near the ball and can only hit the ground when you make an attempt to strike the ball. Rule 13-4
