On the Basketball Court Diagram on page 7 of the NFHS Rules Book the following appears:
MINIMUM OF 3 FEET
Preferably 10 feet of unobstructed space outside. If impossible
to provide 3 feet, a narrow broken 1-inch line should be marked
inside the court parallel with and 3 feet inside the boundary.
That is enough for you to insist that these people vacate this area.
|