What constitutes an improperly delivered jack?

An improperly delivered jack is defined by specific criteria that ensure it is playable within the rules of the game. Each of the scenarios mentioned contributes to the classification of the jack as improperly delivered.

When a jack ends up in the ditch, it is deemed improper because the game rules require that the jack must remain in playable areas of the rink. If it lands in the ditch, it is effectively out of play, failing to meet the necessary conditions for valid play.

Additionally, a jack that is delivered less than 23 meters from the mat line is also considered improperly delivered. This 23-meter minimum distance is crucial, as it defines the area where competitive play can legitimately occur. If it falls short, the delivery is not valid.

Lastly, if the jack comes to rest outside the rink boundaries, it is likewise classified as improperly delivered. The boundaries define the playing area and any equipment that lands outside these limits is not usable, hence invalidating that delivery.

Each of these conditions highlights the importance of maintaining conformity to the game's regulations. Therefore, if any one of these conditions is met, the jack is improperly delivered, validating the choice that encompasses all such scenarios.