Role of Umpire
1. The umpire shall sit or stand in line with the net. Players shall be under the jurisdiction of the umpire from the time at which they arrive at the playing area until they leave it.

2. The umpire shall be responsible for:
2a. checking the acceptability of equipment and playing conditions
and reporting any deficiency to the referee;
2b. taking a ball at random;
2c. conducting the draw for the choice of serving, receiving and ends;
2d. either the umpire or the assistant umpire may:
2da.decide that player's service action is illegal;
2db.decide that, in an otherwise good service, the ball touches the net assembly while passing over or around it;
2dc.decide that a player obstructs the ball;
2dd.decide that the conditions of play are disturbed in a way that may affect the outcome of the rally;
2de.time the duration of the practice period, of play and of intervals;

2e. deciding whether the requirements of the service law may be relaxed for a player with physical disability;
2f. controlling the order of serving, receiving and ends and correcting any errors therein:
2g. deciding each rally as point or a let:
2h. calling the score, in accordance with specified procedure:
2i. introducing the expedite system at the appropriate time:
2j. maintaining the continuity of play:
2k. taking action for breaches of the advice or behaviors regulations.

Role of Assistant Umpire
1. The assistant umpire shall sit directly facing the umpire at the other side of the table.

2. The assistant umpire:
2a.shall decide whether or not the ball in play touches the edge of the playing surface at the side of the table nearest to him.
2b.either the umpire or the assistant umpire may:
2ba.decide that player's service action is illegal;
2bb.decide that, in an otherwise good service, the ball touches the net assembly while passing over or around it;
2bc.decide that a player obstructs the ball;
2bd.decide that the conditions of play are disturbed in a way that may affect the outcome of the rally;
2be.time the duration of the practice period, of play and of intervals;

3. Either the assistant umpire or a separate official may act as stroke counter, to count the strokes of the receiving player or pair when the expedite system is in operation.

4. A decision made by assistant umpire or stroke counter in accordance with the provisions in rule (3.3.2.7/2004-2005) may not be overruled by the umpire.