Part 2 of Golf Etiquette from www.golftimeshop.com
No Disturbance or Distraction
Players should always show consideration for other players on the course and should not disturb their play by moving, talking or making unnecessary noise.
Players should ensure that any electronic device taken onto the course does not distract other players.
On the teeing ground, a player should not tee his ball until it is his turn to play.
Players should not stand close to or directly behind the ball, or directly behind the hole, when a player is about to play.
On the Putting Green
On the putting green, players should not stand on another player's line of putt or when he is making a stroke, cast a shadow over his line of putt.
Players should remain on or close to the putting green until all other players in the group have holed out.
In stroke play, a player who is acting as a marker should, if necessary, on the way to the next tee, check the score with the player concerned and record it.