C (middle) referee is the referee opposite to L frontcourt (usually opposite to the ball), about two steps away from the extension line of the free throw line near the basket. Depending on the position of the ball, C can be on either side of the frontcourt.

T (tracking) referee is a referee who is located at the boundary of the team seat area near the center line and on the same side (ball side) as L.

L and T are on the same side of the field, and C is on the opposite side.

Referee l (leader) The referee is the referee of the finish line.

Referee C (middle) is the referee opposite to L's frontcourt (usually opposite to the ball), about two steps away from the extension line of the free throw line near the basket. Depending on the position of the ball, C can be on either side of the frontcourt.

Referee T (Tracking) Referee is a referee who is located on the same side (ball side) as L, L and T are on the same side of the field and C is on the opposite side.

Call a defensive foul

The referee who announced the defensive foul announced the verdict on the recording table, landed on the side of the recording table, exchanged positions with the referee who was originally on the side of the recording table, and managed all suspension and substitution requests issued by the recording table at this time. If there is a free throw, the new L always falls on the side of the recording table and manages the free throw with the new C on the opposite side (Figure 1).