On the putting green, you may:
- mark, lift and clean your ball (always replace it on the exact spot), and
- repair ball marks and old hole plugs, but not any other damage, such as spike marks (Rule 16-1).
When making a stroke on the putting green, you should ensure that the flagstick is removed or attended. The flagstick may also be removed or attended when the ball lies off the putting green (Rule 17).