The line of putt must
not be touched except:
(i)
the player may remove loose impediments,
provided he does not press anything down;
(ii) the player may place the club in front of the ball when addressing it, provided he does
not press anything down;
(iii) in measuring – Rule 18-6;
(iv) in lifting or replacing the ball – Rule 16-1b;
(v) in
pressing down a ball-marker;
(vi) in repairing old hole plugs or ball marks
on the putting green
– Rule 16-1c; and
(vii) in removing movable obstructions
– Rule 24-1.
(Indicating line for putting on putting green
– see Rule 8-2b)
A ball on the putting green
may be lifted and, if desired, cleaned. The position of the ball must be marked
before it is lifted and the ball must be replaced (see Rule 20-1). When another ball
is in motion, a ball that might influence the movement of the ball in motion
must not be lifted.