When do free-throw restrictions end for players not in marked lane spaces?

Free-throw restrictions for players not in marked lane spaces conclude simultaneously with the shooter’s action. According to the NFHS basketball rules, players who are not occupying designated lane spaces must remain behind the free-throw line until the free throw attempt is taken. The moment the shooter begins their motion and releases the ball, these players are free to legally enter the lane or reposition themselves. This rule helps maintain fair play and ensures that all participants are abiding by the same conditions when the shot is taken.

The other options do not accurately reflect when the restrictions end. For instance, restrictions do not end when the ball leaves the shooter's hands, as that event occurs after the players' ability to move should already be activated. Additionally, the referee signaling the start of play does not correlate with the mechanics of the free throw itself; they merely indicate the readiness to resume play rather than affecting free-throw restrictions. Lastly, while the shooter’s motion is involved, it's specifically the point at which the shot is taken that dictates when the restrictions lift for all players outside the lane.