What defines the space allowed for a designated throw-in?

The space allowed for a designated throw-in is defined as 3 feet wide and has no depth limitation. This specification is important for ensuring that players have enough space to perform the throw-in correctly without interference from opposing players. A 3-foot width allows adequate room for the player to make the pass while adhering to the rules of the game, ensuring that the throw-in is conducted in a fair manner. The absence of a depth limitation signifies that the player can stand as far back as necessary, as long as they remain within the designated width, which enhances the opportunity to execute the throw-in effectively. Understanding this provision is crucial for players and officials to maintain order during set plays such as throw-ins.