Restraining Line

[PAULK1]

The big difference in the 2 plays(restraining line and none)
With a restraining line no player may cross into that area
during a spot throw in and the thrower may cross into that area as the broken line is now the boundry. With no restraining line if you move a defender back from the throw in spot that player may not violate the imposed plane unless
an offensive player goes into that area, then the defensive player may cross into that area to defend.