A game played by two (2) teams on a playing area separated by a net. The aim is to transfer the ball over the net to land on the opponent's court. The ball is put in play with a service. Each team is given three (3) touches in addition to the block contact to return the ball to the opponents court. The rally continues until the ball lands on the playing surface, goes out, or a team fails to return it correctly or a violation is committed.
Park volley was introduced (a park full volleyball courts accommodating co-ed players). The regulation of the 25-point system was systematized. The use of the libero was systematized.
Two sidelines and two end lines mark the playing court. Both sidelines and end lines are drawn inside the dimensions of the playing court. The function is for the referee to know whether the play is an "in" or "out".
The axis of the center line divides the playing court into two equal courts measuring 9m. It extends beneath the net from sideline to sideline. It divides the court into two equal parts; any player is not allowed to cross the center line or it will be called as violation.
On each court, an attack line whose rear edge is drawn 3 meter back from the axis of the center line, marks the front zone. The attack lines separate the front court and the back court.
On each court the front zone is limited by the axis of the corner line and the rear edge of the attack zone. The front zone is considered to extend beyond the side lines to the end of the free zone. Only the front zone players are allowed to spike in the front zone; back row players are not allowed to spike in the front zone or else it will be called as a violation.
Back zone is the area form the attack line extended to the end line/service line. Any player could attack coming from the back zone except the liberos.
The service zone is a 9 meter wide area behind each line. It is literally limited by two short lines, each 15 cm long, drawn 20cm behind the line as an extension of the side lines. Both short lines are included in the width of the service zone. It is where the service takes place.
The substitution zone is limited by the extension of both attack lines up to the scorer's table. It is where the substitution takes place; every team is allowed to have up to 6 substitution per set.
The libero replacement zone is part of the free zone on the side of the team benches. The in and out of the liberos are called replacement and is not counted as the limited substitution of each team; the libero could replaced in or out anytime during dead ball.
The warm up areas, sized approximately 3x3 meter, are located in both of the bench-side corners. It is where the players warm up before coming in the game for a substitution.
Represents the squad in almost all matters regarding the match. His/her sport shirt shall have an underline for easy identification. Signs the score sheet before and after the match for approval of line-up and results. Endorsed to request for usual intervention (time-out/sub). Treasures the right to assign a game captain if he/she is out of the match or the court, and has the right to file a complaint, if needed, after a match.
The "specialized defensive player of the team". Plays defense only. Wears a diverse color of the uniform, in contrast to the rest of the group members. Controlled to carry out as a back row performer. Has no chance to deliver an attack (either from the back or front zones) when the ball is above the net. Is not permitted to serve, block or attempt to block. Substitutions involving libero are not recorded as usual substitutions and such are unlimited. Such is called "replacement". Can be replaced during dead ball only. An injured libero could be replaced regularly. The injured libero cannot re-enter the entire competition. Once a libero, (at the start), always a libero.