There is an easy way to remember where your ball officially
lies when it partially touches two areas of the golf course: The ball is always deemed to lie on the
smaller part of the course. Here are some examples:
1. If any part of your ball touches the putting green, it is
on the green. (The green is smaller than the rest of the hole.)
2. If your ball touches an out-of-bounds line, but any part
of the ball extends past the line onto the course, the ball is on the course.
(The course is smaller than the rest of the world.)
3. If any part of your ball touches a water hazard, the ball
is in the hazard. (The hazard is smaller than the surrounding area.)
The same rule applies to bunkers, casual water, ground under
repair, and the teeing ground. If any part of your ball touches one of these
smaller areas, it is deemed to lie in it.