9 Man Rules:

There are several differences between regular volleyball rules and 9-Man volleyball rules. 

Here are some of the key distinctions:

Team Composition: In regular volleyball, each team consists of six players on the court at a time, while in 9-Man volleyball, teams have nine players on the court simultaneously.

Court Size: The court dimensions are the same for both regular volleyball and 9-Man volleyball, measuring 18 meters long and 9 meters wide.

Net Height: The net height for regular volleyball is typically 7 feet 11 5/8 inches (2.43 meters) for men and 7 feet 4 1/8 inches (2.24 meters) for women. In 9-Man volleyball, the net height may vary depending on the league or tournament.

Rotation: In regular volleyball, players rotate positions in a fixed sequence upon winning a rally. In 9-Man volleyball, players also rotate positions, but the rotation pattern follows a different sequence due to the larger team size.

Serving: The serving rules are generally similar between regular volleyball and 9-Man volleyball. Both require the server to initiate the serve from behind the end line, with one attempt to put the ball into play over the net. No jump serving is allowed and both feet need to be grounded at the point of contact for the serve.

Ball In Play: The objective of both versions is to keep the ball in play and send it over the net within three contacts (excluding blocking). However, due to the larger team size in 9-Man volleyball, the style of play is often more dynamic and fast-paced.

Blocking: Blocking plays a significant role in both regular volleyball and 9-Man volleyball. However, the increased number of players in 9-Man volleyball allows for more blocking opportunities and strategies. Please note in 9-Man blocking you are not allowed to 'break' the plain of your wrists or penetrate / reach over the net.

Back Court Player: The concept of a back court players are essential in 9-Man volleyball. The back court player is a designated defensive specialist who can  be replaced at anytime without counting as a substitution. Their role is to excel in defensive actions such as passing and digging.

Scoring: The scoring system in both versions is based on rally scoring, where points are awarded to the team that wins a rally. However, the number of points required to win a set may vary between regular volleyball and 9-Man volleyball, depending on the league or tournament.

Playing off the net rules:

In 9-Man volleyball, playing off the net refers to a specific rule that allows players to legally play the ball off the net after it has made contact with it. Here's how playing off the net works in 9-Man volleyball:

Initial Contact: When the ball is attacked or blocked by a player and makes contact with the net, it is referred to as the initial contact with the net.

Legal Plays: In 9-Man volleyball, players are allowed to make subsequent plays on the ball after it has made contact with the net, as long as they meet certain criteria:

1. Ball Not Completely Crossing: If the ball does not completely cross the net to the opponent's side after the initial contact, players from the attacking team can continue playing the ball.

2. Player's First Contact: The player making the first contact with the ball after it has touched the net must not have any part of their body (except their hair) touch the net during that play. This includes any part of the body touching the net while attempting to reach for the ball.

3. Within Three Contacts: The subsequent play off the net must still be within the team's three allowable contacts, excluding any blocking contacts.

Illegal Plays: There are certain instances where playing off the net is not allowed, resulting in a violation:

1. Ball Fully Crossing the Net: If the ball fully crosses the net and travels to the opponent's side after the initial contact, it is considered a completed play. Players from the attacking team cannot make any further plays on the ball.

2. Net Touch Violation: If a player making the first contact with the ball after it has touched the net has any part of their body touch the net, it is a net touch violation, and the opposing team is awarded the point.

3. Exceeding Three Contacts: If the subsequent play off the net exceeds the team's three allowable contacts (excluding blocking contacts), it is a violation, and the opposing team is awarded the point.

Block and Net Interference: It's important to note that playing off the net rules do not apply to blocking actions. Players participating in a block can touch the net as long as it does not interfere with the opponent's play or create an advantage.

These rules regarding playing off the net in 9-Man volleyball add an additional layer of strategy and skill to the game, allowing players to maintain control and continue their offensive plays even after the ball has made contact with the net.

Match Conclusion: Regular volleyball matches are typically played as best-of-five sets, while 9-Man volleyball matches also follow a best-of-five sets format. The team that wins three out of the five sets is declared the winner in both cases.

These are the general differences between regular volleyball and 9-Man volleyball rules. However, it's important to note that specific leagues, tournaments, or governing bodies may have additional or modified rules for each version of the game.